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Article ; Online: COVID-19 – (k)eine Zumutung?!

Herold, Christian J / Delorme, Stefan / Weber, Marc-André / Reith, Wolfgang / Helmberger, Thomas / Reiser, Max

2020 Volume 60, Issue 10, Page(s) 891–892

Title translation	COVID-19-never waste a crisis?!
MeSH term(s)	Betacoronavirus ; COVID-19 ; China ; Coronavirus ; Coronavirus Infections ; Humans ; Pandemics ; Pneumonia ; Pneumonia, Viral ; SARS-CoV-2
Keywords	covid19
Language	German
Publishing date	2020-09-29
Publishing country	Germany
Document type	Editorial ; Comment
ZDB-ID	505520-9
ISSN	1432-2102 ; 0033-832X
ISSN (online)	1432-2102
ISSN	0033-832X
DOI	10.1007/s00117-020-00750-x
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Article: COVID-19 - (k)eine Zumutung?!

Herold, Christian J. / Delorme, Stefan / Weber, Marc-Andre / Reith, Wolfgang / Helmberger, Thomas / Reiser, Max

Der Radiologe

Keywords	covid19
Publisher	WHO
Document type	Article
Note	WHO #Covidence: #812616
Database	COVID19

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Article ; Online: COVID-19 – (k)eine Zumutung?!

Herold, Christian J. / Delorme, Stefan / Weber, Marc-André / Reith, Wolfgang / Helmberger, Thomas / Reiser, Max

Der Radiologe

2020 Volume 60, Issue 10, Page(s) 891–892

Keywords	Radiology Nuclear Medicine and imaging ; covid19
Language	German
Publisher	Springer Science and Business Media LLC
Publishing country	us
Document type	Article ; Online
ZDB-ID	505520-9
ISSN	1432-2102 ; 0033-832X
ISSN (online)	1432-2102
ISSN	0033-832X
DOI	10.1007/s00117-020-00750-x
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Time-resolved 3D pulmonary perfusion MRI: comparison of different k-space acquisition strategies at 1.5 and 3 T.

Attenberger, Ulrike I / Ingrisch, Michael / Dietrich, Olaf / Herrmann, Karin / Nikolaou, Konstantin / Reiser, Maximilian F / Schönberg, Stefan O / Fink, Christian

Investigative radiology

2009 Volume 44, Issue 9, Page(s) 525–531

Abstract: ... which can be achieved by using several nonconventional k-space acquisition techniques. The aim of this study is ... to compare the image quality of time-resolved 3D pulmonary perfusion MRI with different k-space acquisition ... enhanced time-resolved 3D pulmonary MRI on 1.5 and 3 T using the following k-space acquisition techniques ...

Abstract	Purpose: Time-resolved pulmonary perfusion MRI requires both high temporal and spatial resolution, which can be achieved by using several nonconventional k-space acquisition techniques. The aim of this study is to compare the image quality of time-resolved 3D pulmonary perfusion MRI with different k-space acquisition techniques in healthy volunteers at 1.5 and 3 T. Methods: Ten healthy volunteers underwent contrast-enhanced time-resolved 3D pulmonary MRI on 1.5 and 3 T using the following k-space acquisition techniques: (a) generalized autocalibrating partial parallel acquisition (GRAPPA) with an internal acquisition of reference lines (IRS), (b) GRAPPA with a single "external" acquisition of reference lines (ERS) before the measurement, and (c) a combination of GRAPPA with an internal acquisition of reference lines and view sharing (VS). The spatial resolution was kept constant at both field strengths to exclusively evaluate the influences of the temporal resolution achieved with the different k-space sampling techniques on image quality. The temporal resolutions were 2.11 seconds IRS, 1.31 seconds ERS, and 1.07 VS at 1.5 T and 2.04 seconds IRS, 1.30 seconds ERS, and 1.19 seconds VS at 3 T.Image quality was rated by 2 independent radiologists with regard to signal intensity, perfusion homogeneity, artifacts (eg, wrap around, noise), and visualization of pulmonary vessels using a 3 point scale (1 = nondiagnostic, 2 = moderate, 3 = good). Furthermore, the signal-to-noise ratio in the lungs was assessed. Results: At 1.5 T the lowest image quality (sum score: 154) was observed for the ERS technique and the highest quality for the VS technique (sum score: 201). In contrast, at 3 T images acquired with VS were hampered by strong artifacts and image quality was rated significantly inferior (sum score: 137) compared with IRS (sum score: 180) and ERS (sum score: 174). Comparing 1.5 and 3 T, in particular the overall rating of the IRS technique (sum score: 180) was very similar at both field strengths. At 1.5 T the peak signal-to-noise ratio of the ERS was significantly lower in comparison to the IRS and the VS technique (14.6 vs. 26.7 and 39.6 respectively, P < 0.004). Conclusion: Using the IRS sampling algorithm comparable image quality and SNR can be achieved at 1.5 and 3 T. At 1.5 T VS offers the best possible solution for the conflicting requirements between a further increased temporal resolution and image quality. In consequence the gain of increased scanning efficiency from advanced k[r]-space sampling acquisition techniques can be exploited for a further improvement of image quality of pulmonary perfusion MRI.
MeSH term(s)	Adolescent ; Adult ; Algorithms ; Female ; Humans ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Lung/anatomy & histology ; Magnetic Resonance Angiography/methods ; Male ; Pulmonary Artery/anatomy & histology ; Reproducibility of Results ; Sensitivity and Specificity ; Young Adult
Language	English
Publishing date	2009-09
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	80345-5
ISSN	1536-0210 ; 0020-9996
ISSN (online)	1536-0210
ISSN	0020-9996
DOI	10.1097/RLI.0b013e3181b4c252
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Article ; Online: Kein SOS in der Kniegelenkdiagnostik!

Reiser, M / Kreitner, K-F

Radiologie (Heidelberg, Germany)

2024 Volume 64, Issue 4, Page(s) 241–243

Title translation	No SOS in knee joint diagnostics!
MeSH term(s)	Knee Joint
Language	German
Publishing date	2024-03-27
Publishing country	Germany
Document type	Editorial
ISSN	2731-7056
ISSN (online)	2731-7056
DOI	10.1007/s00117-024-01279-z
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Article ; Online: T1-weighted brain imaging with a 32-channel coil at 3T using TurboFLASH BLADE compared with standard cartesian k-space sampling.

Attenberger, Ulrike I / Runge, Val M / Williams, Kenneth D / Stemmer, Alto / Michaely, Henrik J / Schoenberg, Stefan O / Reiser, Maximilian F / Wintersperger, Bernd J

Investigative radiology

2009 Volume 44, Issue 3, Page(s) 177–183

Abstract: ... technique offers an alternative k-space sampling scheme reducing the effect of patient related motion ... and contrast-to-noise ratio (CNR) of a new turboFLASH BLADE k-space trajectory with the standard ... Cartesian k-space sampling for brain imaging, using a 32-channel coil at 3T.: Methods: The results ...

Abstract	Purpose: Motion artifacts often markedly degrade image quality in clinical scans. The BLADE technique offers an alternative k-space sampling scheme reducing the effect of patient related motion on image quality. The purpose of this study is the comparison of imaging artifacts, signal-to-noise (SNR), and contrast-to-noise ratio (CNR) of a new turboFLASH BLADE k-space trajectory with the standard Cartesian k-space sampling for brain imaging, using a 32-channel coil at 3T. Methods: The results from 32 patients included after informed consent are reported. This study was performed with a 32-channel head coil on a 3T scanner. Sagittal and axial T1-weighted FLASH sequences (TR/TE 250/2.46 milliseconds, flip angle 70-degree), acquired with Cartesian k-space sampling and T1-weighted turboFLASH sequences (TR/TE/TIsag/TIax 3200/2.77/1144/1056 milliseconds, flip angle 20-degree), using PROPELLER (BLADE) k-space trajectory, were compared. SNR and CNR were evaluated using a paired student t test. The frequency of motion artifacts was assessed in a blinded read. To analyze the differences between both techniques a McNemar test was performed. A P value <0.05 was considered statistically significant. Results: From the blinded read, the overall preference in terms of diagnostic image quality was statistically significant in favor of the BLADE turboFLASH data sets, compared with standard FLASH for both sagittal (P < 0.0001) and axial (P < 0.0001) planes. The frequency of motion artifacts from the scalp was higher for standard FLASH sequences than for BLADE sequences on both axial (47%, P < 0.0003) and sagittal (69%, P < 0.0001) planes. BLADE was preferred in 100% (sagittal plane) and 80% (axial plane) of in-patient data sets and in 68% (sagittal plane) and 73% (axial plane) of out-patient data sets.The BLADE T1 scan did have lower SNRmean (BLADEax 179 +/- 98, Cartesianax 475 +/- 145, BLADEsag 171 +/- 51, and Cartesiansag 697 +/- 129) with P values indicating accordingly a statistically significant difference (Pax <0.0001, Psag < 0.0001), because of the fundamental difference in imaging approach (FLASH vs. turboFLASH). Differences for CNR were also statistically significant, independent of imaging plane (Pax = 0.001, Psag = 0.02). Conclusion: Results demonstrate that turboFLASH BLADE is applicable at 3T with a 32-channel head coil for T1-weighted imaging, with reduced ghost artifacts. This approach offers the first truly clinically applicable T1-weighted BLADE technique for brain imaging at 3T, with consistent excellent image quality.
MeSH term(s)	Brain/anatomy & histology ; Equipment Design ; Equipment Failure Analysis ; Humans ; Image Enhancement/instrumentation ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/instrumentation ; Image Interpretation, Computer-Assisted/methods ; Magnetic Resonance Imaging/instrumentation ; Magnetic Resonance Imaging/methods ; Reproducibility of Results ; Sensitivity and Specificity ; Signal Processing, Computer-Assisted/instrumentation
Language	English
Publishing date	2009-03
Publishing country	United States
Document type	Journal Article
ZDB-ID	80345-5
ISSN	1536-0210 ; 0020-9996
ISSN (online)	1536-0210
ISSN	0020-9996
DOI	10.1097/RLI.0b013e318198a1fd
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Article ; Conference proceedings: Artefaktreduktion der Schulter-MRT durch rotierende K-Raum Auslese bei 3T – Analyse von 80 Patienten

Horng, A / Pietschmann, M / Notohamiprodjo, M / Müller, P / Reiser, M / Glaser, C

RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren

2010

Abstract: Ziele: Vergleich einer konventionellen TSE Sequenz (kTSE) mit linearer K-Raum-Auslese und ... einer Sequenz mit rotierender K-Raum-Auslese (BLADE) bezüglich Bildqualität, anatomischer Detailerkennbarkeit ... besser für Labrumläsionen. : Schlussfolgerung: Die rotierende K-Raum Akquisition (BLADE) ermöglicht ...

Event/congress	91. Deutscher Röntgenkongress, Berlin, 2010
Abstract	Ziele: Vergleich einer konventionellen TSE Sequenz (kTSE) mit linearer K-Raum-Auslese und einer Sequenz mit rotierender K-Raum-Auslese (BLADE) bezüglich Bildqualität, anatomischer Detailerkennbarkeit, diagnostischer Sicherheit von Schulterpathologien. Methode: Das symptomatische Schultergelenk von 80 Patienten wurde mit jeweils einer moderat T2-w koronalen und transversalen BLADE sowie kTSE in identischer Positionierung (TR3000ms/TE45ms/FOV160/BW260Hz) bei 3T mit einer kommerziellen 4-Kanal-Schulterspule untersucht. Die Bilder wurden mit einer 5-Punkt-Likert-Skala (0 schlecht –5 optimal) bewertet für allgemeine Bildqualität, Artefakte, Darstellung relevanter anatomischer Strukturen (Muskeln/Sehnen der Mm supra-, infraspinatus, subscapularis, lange Bizepssehne, Labrum, glenoidaler/humeraler Knorpel, inferiores/mittleres glenohumerales Ligament) und diagnostische Sicherheit bei Pathologie. Statistik: Wilcoxon Test. Ergebnis: Die durchschnittliche Bewertung für die BLADE/kTSE betrug für Bildqualität/Artefakte 4,53/4,64, für die Darstellbarkeit anatomischer Strukturen/diagnostische Sicherheit einer Pathologie 4,64/4,22 (BLADE) und 4,45/4,15 (kTSE). Die Bildqualität war signifikant besser (p=0,001), die Artefaktbildung geringer (p=0,001) und die Darstellung anatomischer Strukturen besser (p=0.02) in der BLADE. Die allgemeine diagnostische Sicherheit war tendenziell besser für die BLADE (4,22 vs. 4,15) gemittelt über alle Pathologien, sie war signifikant (p=0,001) besser für Labrumläsionen. Schlussfolgerung: Die rotierende K-Raum Akquisition (BLADE) ermöglicht eine signifikante Reduktion von Bewegungsartefakten. Sie verbessert die Bildqualität, die anatomische Detailerkennbarkeit und partiell (Labrumläsionen) die diagnostische Sicherheit von Pathologien im Vergleich zu kTSE. BLADE bietet eine vielversprechende Alternative zur Untersuchung v.a. junger, alter, schwer kranker oder klaustrophobischer Patienten, die häufig unfreiwilligen Bewegungen während der MRT unterliegen. Korrespondierender Autor: Horng A Universitätsklinikum LMU München Campus Grosshadern, Institut für Klinische Radiologie, Marchioninistraße 15, 81377 München E-Mail: annie.horng@med.uni-muenchen.de
Keywords	Schultergelenk ; MRT ; BLADE
Language	German
Publishing date	2010-04-16
Publishing place	Stuttgart ; New York
Document type	Article ; Conference proceedings
ZDB-ID	554830-5
ISSN	1438-9010 ; 1438-9029 ; 0340-1618 ; 0936-6652 ; 1433-5972
ISSN (online)	1438-9010
ISSN	1438-9029 ; 0340-1618 ; 0936-6652 ; 1433-5972
DOI	10.1055/s-0030-1252710
Database	Thieme publisher's database

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Article ; Online: XOR risk variants drive diabetic kidney disease.

Zhu, Ke / Reiser, Jochen

Nature metabolism

2023 Volume 5, Issue 4, Page(s) 536–537

MeSH term(s)	Humans ; Diabetic Nephropathies/genetics ; Diabetes Mellitus
Language	English
Publishing date	2023-04-06
Publishing country	Germany
Document type	Journal Article ; Comment
ISSN	2522-5812
ISSN (online)	2522-5812
DOI	10.1038/s42255-023-00768-0
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Article ; Online: Diffusion weighted imaging: a comprehensive evaluation of a fast spin echo DWI sequence with BLADE (PROPELLER) k-space sampling at 3 T, using a 32-channel head coil in acute brain ischemia.

Attenberger, Ulrike I / Runge, Val M / Stemmer, Alto / Williams, Kenneth D / Naul, L Gill / Michaely, Henrik J / Schoenberg, Stefan O / Reiser, Maximilian F / Wintersperger, Bernd J

Investigative radiology

2009 Volume 44, Issue 10, Page(s) 656–661

Abstract: ... imaging (DWI) using a fast spin echo (FSE) sequence with BLADE k-space trajectory at 3 T in combination ... Our preliminary data demonstrates the feasibility of a FSE EPI DWI scan with radial-like k-space sampling, using ...

Abstract	Purpose: To evaluate the signal-to-noise ratio (SNR) and diagnostic quality of diffusion weighted imaging (DWI) using a fast spin echo (FSE) sequence with BLADE k-space trajectory at 3 T in combination with a 32-channel head coil. The scan was compared with a standard spin echo (SE) echo-planar imaging (EPI) DWI and a high resolution SE EPI DWI sequence. Material and methods: Fourteen patients with acute brain ischemia were included in this Institutional Review Board approved study. All patients were evaluated with 3 different image sequences, using a 3 T scanner and a 32-channel head coil: (a) a standard SE EPI DWI (matrix size 192 x 192), (b) a high resolution SE EPI DWI (matrix size of 256 x 256) and (c) a FSE DWI BLADE (matrix size 192 x 192). The SNR of the 3 scans was compared in 10 healthy volunteers by a paired student t test. Image quality was evaluated with 4 dedicated questions in a blinded read: (1) The scans were ranked in terms of bulk susceptibility artifact. (2) The scan preference for diagnosis of any diffusion abnormality that might occur and (3) the preference for visualization of the diffusion abnormality actually present was determined. (4) The influence of bulk susceptibility on image evaluation for the diffusion abnormality present was assessed. Results: For visualization of the diffusion abnormality present, BLADE DWI was the scan sequence preferred most by both readers (reader 1: 41.7%, reader 2: 35.7%). For visualization of any diffusion abnormality present, BLADE DWI was the preferred scan in 13 of 14 cases for reader 1 (93%) and in 11 of 14 cases for reader 2 (78.6%). No high resolution SE EPI DWI scan was rated best by reader 1. Reader 2 rated the high resolution SE EPI DWI scan superior in only 1 of 56 judgments. The standard EPI DWI sequence (21.8 +/- 5.3) had in comparison to the high resolution EPI DWI (11.9 +/- 2.6) and the BLADE DWI scans (11.3 +/- 3.8) significantly higher SNR mean values. Conclusion: Our preliminary data demonstrates the feasibility of a FSE EPI DWI scan with radial-like k-space sampling, using a 32-channel coil at 3 T in acute brain ischemia. The BLADE DWI was the preferred scan for the detection of acute diffusion abnormalities because of the lack of bulk susceptibility artifacts.
MeSH term(s)	Adult ; Aged ; Aged, 80 and over ; Brain Ischemia/diagnosis ; Diffusion Magnetic Resonance Imaging/instrumentation ; Diffusion Magnetic Resonance Imaging/methods ; Equipment Design ; Equipment Failure Analysis ; Female ; Head/pathology ; Humans ; Male ; Middle Aged ; Reproducibility of Results ; Sample Size ; Sensitivity and Specificity ; Signal Processing, Computer-Assisted/instrumentation
Language	English
Publishing date	2009-10
Publishing country	United States
Document type	Evaluation Studies ; Journal Article
ZDB-ID	80345-5
ISSN	1536-0210 ; 0020-9996
ISSN (online)	1536-0210
ISSN	0020-9996
DOI	10.1097/RLI.0b013e3181af3f0e
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Article ; Conference proceedings: Vorteile der rotierenden k-Raum Akquisition mit BLADE für die T2 gewichtete Bildgebung des Abdomens bei 3.0T

Michaely, HJ / Kramer, H / Weckbach, S / Dietrich, O / Reiser, MF / Schönberg, SO

RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren

2007

Abstract: ... Bildgebung des Abdomens mit T2-gewichteten (T2w) TurboSpinEcho (TSE) Sequenzen mit rotierender Auslese von k ... Raum Blöcken (BLADE Technik) im intraindividuellen Vergleich zur T2w-TSE mit konventioneller k-Raum ... Sequenz lag bei 0,69. : Schlussfolgerung: Die T2w-BLADE TSE scheint der T2w-TSE mit konventioneller k ...

Event/congress	88. Deutscher Röntgenkongress, Berlin, 2007
Abstract	Ziele: Ziel dieser Studie die Evaluation der Machbarkeit und der Bildqualität morphologischer Bildgebung des Abdomens mit T2-gewichteten (T2w) TurboSpinEcho (TSE) Sequenzen mit rotierender Auslese von k-Raum Blöcken (BLADE Technik) im intraindividuellen Vergleich zur T2w-TSE mit konventioneller k-Raum Auslese. Methode: 7 gesunde Probanden (25–34 Jahre) und 17 Patienten (25–77 Jahre) mit vermuteter Nieren- oder Nierengefäßerkrankung wurden in diese prospektive intraindividuelle Vergleichsstudie eingeschlossen. Alle Probanden und Patienten wurden in zufälliger Reihenfolge mit einer Standard T2w-TSE Sequenz und einer T2w-BLADE TSE Sequenz bei 3,0T (Siemens Tim Trio) untersucht. Beide Sequenzen akquirierten die gleiche räumlicher Auflösung von 1,4×1,0×4,0mm 3 unter Verwendung von paralleler Bildgebung (Beschleunigungsfaktor 2) und prospektiver Atemtriggerung, wobei die Akquisitionszeit der T2w-BLADE TSE aufgrund des etwas längeren Echozugs mit 2:11min kürzer war als die der Standard-T2w-TSE mit 2:52min. Phantom Messungen wurden zur objektiven Bestimmung des Signal-zu-Rauschen Verhältnisses (SNR) durchgeführt. Zwei geblindete Radiologen bewerteten die Bildschärfe, das Artefaktverhalten und die Gesamtbildqualität beider Techniken unabhängig von einander. Zudem benannten sie die ihrer Ansicht nach bessere Technik. T-Tests (SNR), Wilcoxon-Tests und Kappa-Tests zur Bestimmung der Übereinstimmung wurden zur statistischen Auswertung durchgeführt. Ergebnis: Das SNR zeigte keine signifikanten Unterschiede zwischen beiden Techniken. Die Gesamtbildqualität wurde für die BLADE Sequenz von beiden Radiologen als besser eingestuft (p=n.s. und p=0.01). Es wurden weniger störende Artefakte mit der BLADE gefunden (p=0.01) und die Bildschärfe wurde bei der BLADE als besser eingestuft. Die BLADE-Sequenz war die bevorzugte Sequenz in 64,5% der Fälle, keine Sequenz wurde in 22,9% der Fälle bevorzugt. Der Kappa-Koeffizient der Übereinstimmung hinsichtlich der bevorzugten Sequenz lag bei 0,69. Schlussfolgerung: Die T2w-BLADE TSE scheint der T2w-TSE mit konventioneller k-Raum Auslese bei der Darstellung der nominelles Organe deutlich überlegen zu sein, was insbesondere durch die signifikant verminderte Anzahl von Artefakten und die höhere Bildschärfe begründet ist. Korrespondierender Autor: Michaely HJ Ludwig-Maximilians-Universität München – Klinikum Grosshadern, Institut für Klinische Radiologie, Marchioninistr.15, 81377 München E-Mail: henrik.michaely@med.uni-muenchen.de
Keywords	BLADE ; 3,0 Tesla ; Niere
Language	German
Publishing date	2007-05-09
Publishing place	Stuttgart ; New York
Document type	Article ; Conference proceedings
ZDB-ID	554830-5
ISSN	1438-9010 ; 1438-9029 ; 0340-1618 ; 0936-6652 ; 1433-5972
ISSN (online)	1438-9010
ISSN	1438-9029 ; 0340-1618 ; 0936-6652 ; 1433-5972
DOI	10.1055/s-2007-976973
Database	Thieme publisher's database

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