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Article ; Online: Imaging report and data system (RADS) for bone tumors: where do we stand and future directions.

Ribeiro, Guilherme Jaquet / Gillet, Romain / Blum, Alain / Teixeira, Pedro Augusto Gondim

2022 Volume 52, Issue 2, Page(s) 151–156

MeSH term(s)	Humans ; Forecasting ; Bone Neoplasms/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Retrospective Studies
Language	English
Publishing date	2022-09-08
Publishing country	Germany
Document type	Editorial
ZDB-ID	527592-1
ISSN	1432-2161 ; 0364-2348
ISSN (online)	1432-2161
ISSN	0364-2348
DOI	10.1007/s00256-022-04179-2
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Zs.A 1304: Show issues

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Article ; Online: Methodology for quantitative evaluation of mandibular condyles motion symmetricity from real-time MRI in the axial plane.

Isaieva, Karyna / Leclère, Justine / Felblinger, Jacques / Gillet, Romain / Dubernard, Xavier / Vuissoz, Pierre-André

Magnetic resonance imaging

2023 Volume 102, Page(s) 115–125

Abstract: Diagnosis of temporomandibular disorders is currently based on clinical examination and static MRI. Real-time MRI enables tracking of condylar motion and, thus, evaluation of their motion symmetricity (which could be associated with temporomandibular ... ...

Abstract	Diagnosis of temporomandibular disorders is currently based on clinical examination and static MRI. Real-time MRI enables tracking of condylar motion and, thus, evaluation of their motion symmetricity (which could be associated with temporomandibular joint disorders). The purpose of this work is to propose an acquisition protocol, an image processing approach, and a set of parameters enabling objective assessment of motion asymmetry; to check the reliability and find the limitations of the approach, and to verify if the automatically calculated parameters are associated with the motion symmetricity. A rapid radial FLASH sequence was used to acquire a dynamic set of axial images for 10 subjects. One more subject was involved to estimate the dependence of the motion parameters on the slice placement. The images were segmented with a semi-automatic approach based on U-Net convolutional neural network, and the condyles' mass centers were projected on the mid-sagittal axis. Resulting projection curves were used for the extraction of various motion parameters including latency, velocity peak delay, and maximal displacement between the right and the left condyle. These automatically calculated parameters were compared with the physicians' scores. The proposed segmentation approach allowed a reliable center of mass tracking. Latency and velocity peak delay were found to be invariant to the slice position, and maximal displacement difference considerably varied. The automatically calculated parameters demonstrated a significant correlation with the experts' scores. The proposed acquisition and data processing protocol enables the automatizable extraction of quantitative parameters that characterize the symmetricity of condylar motion.
MeSH term(s)	Humans ; Mandibular Condyle ; Temporomandibular Joint/diagnostic imaging ; Reproducibility of Results ; Magnetic Resonance Imaging/methods ; Temporomandibular Joint Disorders/diagnostic imaging
Language	English
Publishing date	2023-05-13
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	604885-7
ISSN	1873-5894 ; 0730-725X
ISSN (online)	1873-5894
ISSN	0730-725X
DOI	10.1016/j.mri.2023.05.006
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Zs.A 1817: Show issues

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Article ; Online: Olfactory cleft stenosis and obstruction on paranasal sinus CT scan in pre-septo-rhinoplasty patients: normal variants or pathologic findings?

Imbs, Sara / Deyrail, Baptiste / Nguyen, Duc Trung / Hossu, Gabriela / Blum, Alain / Gondim Teixeira, Pedro Augusto / Rumeau, Cécile / Jankowski, Roger / Gillet, Romain

European radiology

2024

Abstract: Objective(s): To determine the frequency of olfactory cleft (OC) stenosis and obstruction on paranasal sinus CT scans in pre-septorhinoplasty of patients who had septal deviation, septopyramidal deformation or nasal obstruction without other sinonasal ... ...

Abstract	Objective(s): To determine the frequency of olfactory cleft (OC) stenosis and obstruction on paranasal sinus CT scans in pre-septorhinoplasty of patients who had septal deviation, septopyramidal deformation or nasal obstruction without other sinonasal conditions. Methods: This retrospective study included patients referred to our institution between December 2013 and December 2021 for septorhinoplasty due to nasal obstruction without other sinonasal or neurological conditions. All patients underwent preoperative paranasal sinus CT scan and olfactory testing. OC stenosis was quoted as none, partial, or total (less than 1/3 contact between nasal septum and ethmoid turbinates, 1/3-2/3, more than 2/3, respectively), as well as OC obstruction as none, partial, or complete (obstruction of less than 1/3 of OC, 1/3-2/3, more than 2/3, respectively). Radiologic evaluation was validated by near perfect interobserver agreement. Results: A total of 75 patients (32 women, 43 men) with a mean age of 44.2 ± 15.64 (23-74) years were included, of which 36 were normosmic and 39 hyposmic. OC stenosis was partial in 58.7% (n = 44) of the patients, absent in 28% (n = 21), and total in 13.3% (n = 10), without difference between normosmic and hyposmic patients (p = .66). OC obstruction was absent in 52% (n = 39) and partial in 46.7% (n = 35), without difference between normosmic and hyposmic patients (p = .51). Only one normosmic patient had complete OC obstruction. Conclusion: OC partial stenosis and partial obstruction were frequent findings in pre-septorhinoplasty patients without respiratory mucosa disease and did not influence their olfactory status. Total stenosis and complete obstruction were rarer and require further investigation. Clinical relevance statement: Isolated partial olfactory cleft stenosis and obstruction should be considered normal variants, whereas the impact of complete olfactory cleft stenosis and obstruction on patient's olfactory status remains to be determined. Key points: • The incidence of olfactory cleft stenosis and obstruction in asymptomatic patients remains unknown, even though it is encountered in clinical practice. • Partial and total olfactory cleft stenosis occurred in 58.7% and 13.3% of the patients; partial obstruction occurred in half of the cases, but complete obstruction was extremely rare. • There are frequent findings of partial olfactory cleft obstruction and stenosis, but complete obstruction and total stenosis should be further investigated.
Language	English
Publishing date	2024-01-11
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1085366-2
ISSN	1432-1084 ; 0938-7994 ; 1613-3749
ISSN (online)	1432-1084
ISSN	0938-7994 ; 1613-3749
DOI	10.1007/s00330-023-10564-9
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Zs.A 3300: Show issues

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Article ; Online: Measurement of stapes footplate thickness using ultra-high-resolution computed tomography: stapes axial plane correlates better with otosclerosis than lateral semicircular canal plane.

Gillet, Romain / Eliezer, Michael / Hossu, Gabriela / Lombard, Charles / Boubaker, Fatma / Blum, Alain / Gondim Teixeira, Pedro Augusto / Parietti-Winkler, Cécile

Acta oto-laryngologica

2024 , Page(s) 1–7

Abstract: Background, aims: Stapes footplate thickness measurement using ultra-high-resolution CT has been described only in the lateral semicircular canal plane. The purpose of this study was to compare stapes footplate thickness between the lateral semicircular ...

Abstract	Background, aims: Stapes footplate thickness measurement using ultra-high-resolution CT has been described only in the lateral semicircular canal plane. The purpose of this study was to compare stapes footplate thickness between the lateral semicircular canal and stapes axial planes in patients with otosclerosis compared to controls. Material and methods: We performed a retrospective single-center study of patients undergoing high-resolution temporal bone CT. Two radiologists measured stapes footplate thickness in both the lateral semicircular canal and stapes axial planes. Results: Between February 2020 and October 2022, we collected 81 ears from 49 patients (75% of women; mean age 51.22 ± 16.6 years, 17 otosclerosis, and 64 controls). In the stapes axial plane, there was a significant anterior thickening in otosclerosis patients (Reader 1: 0.52 ± 0.12 [0.3-0.7] vs. 0.41 ± 0.08 [0.3-0.6], Conclusion: The stapes footplate was thickened at its AC in otosclerosis patients using only the stapes axial plane. Significance: We propose to use the stapes axial plane instead of the lateral semicircular canal plane when analyzing the stapes.
Language	English
Publishing date	2024-04-25
Publishing country	England
Document type	Journal Article
ISSN	1651-2251
ISSN (online)	1651-2251
DOI	10.1080/00016489.2024.2340083
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Ul II Zs 105: Show issues

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Article ; Online: Ultra-high-resolution CT of the temporal bone: The end of stapes prosthesis dimensional error and correlation with patient symptoms.

Boukhzer, Sara / Eliezer, Michael / Boubaker, Fatma / Hossu, Gabriela / Blum, Alain / Teixeira, Pedro / Parietti-Winkler, Cécile / Gillet, Romain

European journal of radiology

2024 Volume 175, Page(s) 111467

Abstract: Purpose: To describe the reliability of ultra-high-resolution computed tomography (UHR-CT) in the measurement of titanium stapes prostheses using manufacturer data as a reference.: Materials and methods: This retrospective study included patients ... ...

Abstract	Purpose: To describe the reliability of ultra-high-resolution computed tomography (UHR-CT) in the measurement of titanium stapes prostheses using manufacturer data as a reference. Materials and methods: This retrospective study included patients treated by stapedectomy with titanium prostheses who underwent UHR-CT between January 2020 and October 2023. Images were acquired using an ultra-high-resolution mode (slice thickness: 0.25 mm; matrix, 1024 × 1024). Two radiologists independently evaluated the length, diameter, and intra-vestibular protrusion of the prosthesis. Post-operative air-bone gaps (ABGs) were recorded. Results: Fourteen patients were enrolled (mean age, 44.3 ± 13.8 [SD] years, 9 females), resulting in 16 temporal bone UHR-CTs. The exact length was obtained in 81.3 % (n = 13/16) and underestimated by 0.1 to 0.3 mm in the remaining 18.7 % (n = 3/16) CT scans for both readers (mean misestimation: -0.02 ± 0.06 [SD] mm, overall underestimation of 0.43 %). The exact diameter was reported in 75 % (n = 12/16) and 87.5 % (n = 14/16) of the CT scans for readers 1 and 2, respectively, and was off by 0.1 mm in all discrepancies (mean misestimation: 0.01 ± 0.04 [SD] mm, overall overestimation of 2.43 %). Intravestibular prosthesis protrusion was of 0.5 ± 0.43 [SD] mm (range: 0-1) and 0.49 ± 0.44 [SD] mm (range: 0-1.1) for readers 1 and 2, respectively, and did not correlate with ABGs (r = 0.25 and 0.22; P = 0.39 and 0.47 for readers 1 and 2, respectively). Intra and interobserver agreements were excellent. Conclusion: UHR-CT provides 99.6 % and 97.6 % accuracy for prosthesis length and diameter measurements, respectively.
MeSH term(s)	Humans ; Female ; Male ; Adult ; Temporal Bone/diagnostic imaging ; Retrospective Studies ; Tomography, X-Ray Computed/methods ; Reproducibility of Results ; Ossicular Prosthesis ; Stapes Surgery ; Middle Aged ; Titanium ; Prosthesis Design
Language	English
Publishing date	2024-04-13
Publishing country	Ireland
Document type	Journal Article
ZDB-ID	138815-0
ISSN	1872-7727 ; 0720-048X
ISSN (online)	1872-7727
ISSN	0720-048X
DOI	10.1016/j.ejrad.2024.111467
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Zs.A 1630: Show issues

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Article ; Online: Computed Tomography Bone Imaging: Pushing the Boundaries in Clinical Practice.

Gillet, Romain / Boubaker, Fatma / Hossu, Gabriela / Thay, Anthony / Gillet, Pierre / Blum, Alain / Teixeira, Pedro Augusto Gondim

Seminars in musculoskeletal radiology

2023 Volume 27, Issue 4, Page(s) 397–410

Abstract: Bone microarchitecture has several clinical implications over and above estimating bone strength. Computed tomography (CT) analysis mainly uses high-resolution peripheral quantitative CT and micro-CT, research imaging techniques, most often limited to ... ...

Abstract	Bone microarchitecture has several clinical implications over and above estimating bone strength. Computed tomography (CT) analysis mainly uses high-resolution peripheral quantitative CT and micro-CT, research imaging techniques, most often limited to peripheral skeleton assessment. Ultra-high-resolution (UHR) CT and photon-counting detector CT, two commercially available techniques, provide images that can approach the spatial resolution of the trabeculae, bringing bone microarchitecture analysis into clinical practice and improving depiction of bone vascularization, tumor matrix, and cortical and periosteal bone. This review presents bone microarchitecture anatomy, principles of analysis, reference measurements, and an update on the performance and potential clinical applications of these new CT techniques. We also share our clinical experience and technical considerations using an UHR-CT device.
MeSH term(s)	Humans ; Tomography, X-Ray Computed ; Cancellous Bone ; Radiopharmaceuticals
Chemical Substances	Radiopharmaceuticals
Language	English
Publishing date	2023-09-25
Publishing country	United States
Document type	Review ; Journal Article
ZDB-ID	1360919-1
ISSN	1098-898X ; 1089-7860
ISSN (online)	1098-898X
ISSN	1089-7860
DOI	10.1055/s-0043-1768451
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Zs.A 4887: Show issues

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Article ; Online: Initial Evaluation of Focal Bone Lesions: How Do We Do It?

Gondim Teixeira, Pedro Augusto / Lemore, Astrée / Vogt, Nora / Oster, Julien / Hossu, Gabriela / Gillet, Romain / Blum, Alain

Seminars in musculoskeletal radiology

2023 Volume 27, Issue 4, Page(s) 471–479

Abstract: Focal bone lesions are frequent, and management greatly depends on the characteristics of their images. After briefly discussing the required work-up, we analyze the most relevant imaging signs for assessing potential aggressiveness. We also describe the ...

Abstract	Focal bone lesions are frequent, and management greatly depends on the characteristics of their images. After briefly discussing the required work-up, we analyze the most relevant imaging signs for assessing potential aggressiveness. We also describe the imaging aspects of the various types of lesion matrices and their clinical implications.
MeSH term(s)	Humans ; Bone Diseases ; Cartilage Diseases
Language	English
Publishing date	2023-09-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	1360919-1
ISSN	1098-898X ; 1089-7860
ISSN (online)	1098-898X
ISSN	1089-7860
DOI	10.1055/s-0043-1769775
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Article ; Online: Zero echo time MRI in shoulder MRI protocols for the diagnosis of rotator cuff calcific tendinopathy improves identification of calcific deposits compared to conventional MR sequences but remains sub-optimal compared to radiographs.

Puel, Ulysse / Lombard, Charles / Hossu, Gabriela / Louis, Mathias / Blum, Alain / Teixeira, Pedro Augusto Gondim / Gillet, Romain

European radiology

2023 Volume 33, Issue 9, Page(s) 6381–6391

Abstract: Objective: To compare the diagnostic performance of standard MRI and standard MRI + ZTE images for the detection of rotator cuff calcific tendinopathy (RCCT) and to describe the artifacts encountered with ZTE images, using computed radiography (CR) as a ...

Abstract	Objective: To compare the diagnostic performance of standard MRI and standard MRI + ZTE images for the detection of rotator cuff calcific tendinopathy (RCCT) and to describe the artifacts encountered with ZTE images, using computed radiography (CR) as a reference. Methods: In a retrospective study, patients with suspicion of rotator cuff tendinopathy who underwent standard MRI + ZTE images after radiography were enrolled between June 2021 and June 2022. Images were independently analyzed for calcific deposit presence and ZTE images artifacts, by two radiologists. Diagnostic performance was calculated individually with MRI + CR as the reference standard. Results: A total of 46 RCCT subjects (27 women; mean age, 55.3 years ± 12.4) and 51 control subjects (27 men; mean age, 45.5 ± 12.9) were evaluated. For both readers, there was an increase in the sensitivity for the identification of calcific deposits of MRI + ZTE compared to MRI (77% (95% CI: 64.5-86.8) and 75.4% (95% CI: 62.7-85.5) versus 57.4% (95% IC: 44.1-70) and 47.5% (95% IC: 34.6-60.7), for R1 and R2, respectively). Specificity was quite similar for both readers and both imaging techniques and ranged from 96.6% (95% IC: 93.3-98.5) to 98.7% (95% IC: 96.3-99.7). Hyperintense joint fluid (62.8% of patients), long head of the biceps tendon (in 60.8%), and subacromial bursa (in 27.8%) on ZTE were considered artifactual. Conclusion: The addition of ZTE images to a standard MRI protocol improved MRI diagnostic performance of RCCT, but with a suboptimal detection rate and a relatively high frequency of artifactual soft tissue signal hyperintensity. Key points: • Adding ZTE images to standard shoulder MRI improves the MR-based detection of rotator cuff calcific tendinopathy, but half of the calcification unseen with standard MRI remained unseen with ZTE MRI. On ZTE images, joint fluid and long head biceps tendon were hyperintense in about 60% of the shoulders, as well as the subacromial bursa in about 30%, without calcific deposit on conventional radiographs. • The detection rate of calcific deposits using ZTE images was dependent on the disease phase. In the calcific stage, it reached 100% in this study but remained at a maximum of 80.7% in the resorptive phase.
MeSH term(s)	Male ; Humans ; Female ; Middle Aged ; Adult ; Rotator Cuff/diagnostic imaging ; Shoulder ; Retrospective Studies ; Magnetic Resonance Imaging/methods ; Radiography ; Tendinopathy/diagnostic imaging
Language	English
Publishing date	2023-04-04
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1085366-2
ISSN	1432-1084 ; 0938-7994 ; 1613-3749
ISSN (online)	1432-1084
ISSN	0938-7994 ; 1613-3749
DOI	10.1007/s00330-023-09602-3
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Article ; Online: Radiological evolution of progestogen-induced meningioma: A monocentric retrospective study.

Ahmed-Khalifa, Taghla / Gillet, Romain / Blonski, Marie / Rech, Fabien / Fresse, Audrey / Gillet, Pierre / Taillandier, Luc / Petitpain, Nadine

Fundamental & clinical pharmacology

2023 Volume 37, Issue 4, Page(s) 868–878

Abstract: Cyproterone acetate (CPA) is known to induce meningioma, and recently, nomegestrol acetate (NMA) and chlormadinone acetate (CMA) were also involved. Progestagen-induced meningioma management starts with progestogen discontinuation and is either ... ...

Abstract	Cyproterone acetate (CPA) is known to induce meningioma, and recently, nomegestrol acetate (NMA) and chlormadinone acetate (CMA) were also involved. Progestagen-induced meningioma management starts with progestogen discontinuation and is either interventional (surgery and/or radiotherapy) or conservative (clinical and MRI radiological follow-up). We performed a retrospective volumetric radiological outcomSe study of progestogen-induced meningiomas diagnosed in our hospital. We analysed progestogen-related meningiomas diagnosed until 30 June 2021, with at least one diagnostic and one follow-up MRI results. Meningioma volumes were centrally retrospectively measured using a T1-weighted 3D millimeter sequence with gadolinium injection on a postprocessing console. We analysed 98 meningiomas of 38 females and one transgender (male-to-female), of which 25 (64.1%) had taken CPA, seven (17.9%) NMA, three (7.7%) CMA, and four (10.2%) several progestogens. Eleven patients (24 meningiomas) underwent interventional management, seven patients had meningiomas followed by conservative or interventional management, and 21 patients (51 meningiomas) had only conservative management. Of these 21 patients, 17 had discontinued their progestogen less than 6 months before, of which 14 (82.3%) had decreased or stable meningioma(s) during a 24-month median follow-up (3 to 75) period. Overall, four of the 39 patients experienced meningioma progression (three during conservative treatment and one after surgery), including two patients who had continued NMA or CMA treatment several years after diagnosis. Our study confirms a generally favourable outcome of progestogen-related meningioma after conservative treatment, especially for CPA. It also underlines the need for progestogen discontinuation at meningioma diagnosis.
MeSH term(s)	Humans ; Male ; Female ; Meningioma/chemically induced ; Meningioma/diagnostic imaging ; Meningioma/surgery ; Progestins/adverse effects ; Retrospective Studies ; Meningeal Neoplasms/chemically induced ; Meningeal Neoplasms/diagnostic imaging ; Meningeal Neoplasms/surgery ; Magnetic Resonance Imaging
Chemical Substances	Progestins
Language	English
Publishing date	2023-02-03
Publishing country	England
Document type	Journal Article
ZDB-ID	639134-5
ISSN	1472-8206 ; 0767-3981
ISSN (online)	1472-8206
ISSN	0767-3981
DOI	10.1111/fcp.12878
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Zs.A 2247: Show issues

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Article ; Online: Assessment of Scapholunate Instability on 4D CT Scans in Patients with Inconclusive Conventional Images.

Orkut, Sinan / Gillet, Romain / Granero, Jonathan / Hossu, Gabriela / Douis, Nicolas / Athlani, Lionel / Blum, Alain / Gondim Teixeira, Pedro Augusto

Radiology

2023 Volume 308, Issue 3, Page(s) e230193

Abstract: Background Initial imaging work-up using radiography and CT arthrography sometimes can be insufficient to identify a scapholunate (SL) instability (SLI) in patients suspected of having SL ligament tears. Purpose To determine the diagnostic performance of ...

Abstract	Background Initial imaging work-up using radiography and CT arthrography sometimes can be insufficient to identify a scapholunate (SL) instability (SLI) in patients suspected of having SL ligament tears. Purpose To determine the diagnostic performance of four-dimensional (4D) CT in the identification of SLI and apply the findings to patients suspected of having SLI and with inconclusive findings on radiographs and CT arthrograms. Materials and Methods This prospective single-center study enrolled participants suspected of having SLI (recent trauma, dorsal pain, positive Watson test results, decreased grip strength) between March 2015 and March 2020. Participants with wrist fractures, substantial joint stiffness, or history of wrist surgery were excluded. Each participant underwent radiography, CT arthrography, and 4D CT on the same day. Participants were divided into three groups: those with no SLI, those with SLI, and those with inconclusive results. SL gap and radioscaphoid and lunocapitate angle were measured using semiautomatic quantitative analysis of 4D CT images by two independent readers. Receiver operating characteristic curves were used to evaluate the diagnostic performance of 4D CT. Thresholds were determined with the Youden index and were applied to the inconclusive group. Results Of the 150 included participants (mean age, 41 years ± 14 [SD]; 102 male, 48 female), there were 63 with no SLI, 48 with SLI, and 39 with inconclusive results. The maximum value and range of SL gap measurements on 4D CT scans showed high sensitivity (83% [40 of 48] and 90% [43 of 48], respectively) and high specificity (95% [59 of 62] and 81% [50 of 62], respectively) in the identification of SLI. At least one of these parameters was abnormal on 4D CT scans in 17 of 39 (44%) participants in the inconclusive group, and 10 of 17 (59%) participants had confirmed SLI. In the 22 participants in the inconclusive group with no indication of SLI at 4D CT, follow-up showed no evidence of SLI in 10 (45%) and enabled confirmation of SLI via arthroscopy in three (14%). Conclusion Scapholunate gap measurements on kinematic 4D CT scans enabled correct identification of SLI in 59% of participants with inconclusive results on conventional images. ClinicalTrials.gov registration no. NCT02401568 © RSNA, 2023
MeSH term(s)	Humans ; Female ; Male ; Adult ; Four-Dimensional Computed Tomography ; Prospective Studies ; Arthroscopy ; Fractures, Bone ; Ligaments, Articular
Language	English
Publishing date	2023-09-11
Publishing country	United States
Document type	Journal Article
ZDB-ID	80324-8
ISSN	1527-1315 ; 0033-8419
ISSN (online)	1527-1315
ISSN	0033-8419
DOI	10.1148/radiol.230193
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