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  1. Article: Asymptomatic air collection in the left atrium after computed tomography-guided lung biopsy.

    Inoue, Akitoshi / Ohuchi, Masatsugu / Inoue, Shuhei

    Turk gogus kalp damar cerrahisi dergisi

    2022  Volume 30, Issue 1, Page(s) 129–131

    Abstract: Systemic air embolism is a fatal lung biopsy complication, despite its low incidence. Incidental air immigration into the pulmonary vein passing through the left heart circulation results in air embolism in percutaneous lung biopsy. Herein, we report a ... ...

    Abstract Systemic air embolism is a fatal lung biopsy complication, despite its low incidence. Incidental air immigration into the pulmonary vein passing through the left heart circulation results in air embolism in percutaneous lung biopsy. Herein, we report a 73-year-old man who presented with massive air collection in the left atrium after computed tomography-guided lung biopsy which resolved without any symptom. Computed tomography fluoroscopy confirmed the gradual absorption process.
    Language English
    Publishing date 2022-01-28
    Publishing country Turkey
    Document type Case Reports
    ISSN 1301-5680
    ISSN 1301-5680
    DOI 10.5606/tgkdc.dergisi.2022.21058
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Asystole During CT-Guided Biopsy of a Mediastinal Tumor due to Vasovagal Reflex.

    Inoue, Akitoshi / Ohuchi, Masatsugu / Inoue, Shuhei

    Cardiovascular and interventional radiology

    2020  Volume 43, Issue 10, Page(s) 1581–1582

    Language English
    Publishing date 2020-06-08
    Publishing country United States
    Document type Letter
    ZDB-ID 603082-8
    ISSN 1432-086X ; 0342-7196 ; 0174-1551
    ISSN (online) 1432-086X
    ISSN 0342-7196 ; 0174-1551
    DOI 10.1007/s00270-020-02542-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1378: Show issues Location:
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  3. Article ; Online: Computed tomography diagnosis of transomental hernia.

    Inoue, Akitoshi / Furukawa, Akira

    Japanese journal of radiology

    2019  Volume 37, Issue 12, Page(s) 860–861

    MeSH term(s) Colon, Transverse ; Hernia ; Hernia, Abdominal ; Humans ; Tomography
    Language English
    Publishing date 2019-09-21
    Publishing country Japan
    Document type Letter ; Comment
    ZDB-ID 2488907-6
    ISSN 1867-108X ; 1867-1071
    ISSN (online) 1867-108X
    ISSN 1867-1071
    DOI 10.1007/s11604-019-00879-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 2249: Show issues Location:
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  4. Article: Self-trained deep convolutional neural network for noise reduction in CT.

    Zhou, Zhongxing / Inoue, Akitoshi / McCollough, Cynthia H / Yu, Lifeng

    Journal of medical imaging (Bellingham, Wash.)

    2023  Volume 10, Issue 4, Page(s) 44008

    Abstract: Purpose: Supervised deep convolutional neural network (CNN)-based methods have been actively used in clinical CT to reduce image noise. The networks of these methods are typically trained using paired high- and low-quality data from a massive number of ... ...

    Abstract Purpose: Supervised deep convolutional neural network (CNN)-based methods have been actively used in clinical CT to reduce image noise. The networks of these methods are typically trained using paired high- and low-quality data from a massive number of patients and/or phantom images. This training process is tedious, and the network trained under a given condition may not be generalizable to patient images acquired and reconstructed under different conditions. We propose a self-trained deep CNN (ST_CNN) method for noise reduction in CT that does not rely on pre-existing training datasets.
    Approach: The ST_CNN training was accomplished using extensive data augmentation in the projection domain, and the inference was applied to the data itself. Specifically, multiple independent noise insertions were applied to the original patient projection data to generate multiple realizations of low-quality projection data. Then, rotation augmentation was adopted for both the original and low-quality projection data by applying the rotation angle directly on the projection data so that images were rotated at arbitrary angles without introducing additional bias. A large number of paired low- and high-quality images from the same patient were reconstructed and paired for training the ST_CNN model.
    Results: No significant difference was found between the ST_CNN and conventional CNN models in terms of the peak signal-to-noise ratio and structural similarity index measure. The ST_CNN model outperformed the conventional CNN model in terms of noise texture and homogeneity in liver parenchyma as well as better subjective visualization of liver lesions. The ST_CNN may sacrifice the sharpness of vessels slightly compared to the conventional CNN model but without affecting the visibility of peripheral vessels or diagnosis of vascular pathology.
    Conclusions: The proposed ST_CNN method trained from the data itself may achieve similar image quality in comparison with conventional deep CNN denoising methods pre-trained on external datasets.
    Language English
    Publishing date 2023-08-24
    Publishing country United States
    Document type Journal Article
    ISSN 2329-4302
    ISSN 2329-4302
    DOI 10.1117/1.JMI.10.4.044008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Imaging of Perirenal and Intrarenal Lymphatic Vessels: Anatomy-based Approach.

    Takahashi, Hiroaki / Inoue, Akitoshi / Tanaka, Takashi / Sato, Yuki / Potretzke, Theodora A / Masuoka, Sota / Takahashi, Naoki / Minami, Manabu / Kawashima, Akira

    Radiographics : a review publication of the Radiological Society of North America, Inc

    2024  Volume 44, Issue 3, Page(s) e230065

    Abstract: The lymphatic system (or lymphatics) consists of lymphoid organs and lymphatic vessels. Despite the numerous previously published studies describing conditions related to perirenal and intrarenal lymphoid organs in the radiology literature, the ... ...

    Abstract The lymphatic system (or lymphatics) consists of lymphoid organs and lymphatic vessels. Despite the numerous previously published studies describing conditions related to perirenal and intrarenal lymphoid organs in the radiology literature, the radiologic findings of conditions related to intrarenal and perirenal lymphatic vessels have been scarcely reported. In the renal cortex, interlobular lymphatic capillaries do not have valves; therefore, lymph can travel along the primary route toward the hilum, as well as toward the capsular lymphatic plexus. These two lymphatic pathways can be opacified by contrast medium via pyelolymphatic backflow at CT urography, which reflects urinary contrast agent leakage into perirenal lymphatic vessels via forniceal rupture. Pyelolymphatic backflow toward the renal hilum should be distinguished from urinary leakage due to urinary injury. Delayed subcapsular contrast material retention via pyelolymphatic backflow, appearing as hyperattenuating subcapsular foci on CT images, mimics other subcapsular cystic diseases. In contrast to renal parapelvic cysts originating from the renal parenchyma, renal peripelvic cysts are known to be of lymphatic origin. Congenital renal lymphangiectasia is mainly seen in children and assessed and followed up at imaging. Several lymphatic conditions, including lymphatic leakage as an early complication and acquired renal lymphangiectasia as a late complication, are sometimes identified at imaging follow-up of kidney transplant. Lymphangiographic contrast material accumulation in the renal hilar lymphatic vessels is characteristic of chylo-urinary fistula. Chyluria appears as a fat-layering fluid-fluid level in the urinary bladder or upper urinary tract. Recognition of the anatomic pathway of tumor spread via lymphatic vessels at imaging is of clinical importance for accurate management at oncologic imaging.
    MeSH term(s) Child ; Humans ; Contrast Media ; Lymphatic System ; Lymphatic Vessels/diagnostic imaging ; Kidney Neoplasms ; Cysts
    Chemical Substances Contrast Media
    Language English
    Publishing date 2024-02-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 603172-9
    ISSN 1527-1323 ; 0271-5333
    ISSN (online) 1527-1323
    ISSN 0271-5333
    DOI 10.1148/rg.230065
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    Zs.A 1751: Show issues Location:
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  6. Article: Multislice input for 2D and 3D residual convolutional neural network noise reduction in CT.

    Zhou, Zhongxing / Huber, Nathan R / Inoue, Akitoshi / McCollough, Cynthia H / Yu, Lifeng

    Journal of medical imaging (Bellingham, Wash.)

    2023  Volume 10, Issue 1, Page(s) 14003

    Abstract: Purpose: Deep convolutional neural network (CNN)-based methods are increasingly used for reducing image noise in computed tomography (CT). Current attempts at CNN denoising are based on 2D or 3D CNN models with a single- or multiple-slice input. Our ... ...

    Abstract Purpose: Deep convolutional neural network (CNN)-based methods are increasingly used for reducing image noise in computed tomography (CT). Current attempts at CNN denoising are based on 2D or 3D CNN models with a single- or multiple-slice input. Our work aims to investigate if the multiple-slice input improves the denoising performance compared with the single-slice input and if a 3D network architecture is better than a 2D version at utilizing the multislice input.
    Approach: Two categories of network architectures can be used for the multislice input. First, multislice images can be stacked channel-wise as the multichannel input to a 2D CNN model. Second, multislice images can be employed as the 3D volumetric input to a 3D CNN model, in which the 3D convolution layers are adopted. We make performance comparisons among 2D CNN models with one, three, and seven input slices and two versions of 3D CNN models with seven input slices and one or three output slices. Evaluation was performed on liver CT images using three quantitative metrics with full-dose images as reference. Visual assessment was made by an experienced radiologist.
    Results: When the input channels of the 2D CNN model increases from one to three to seven, a trend of improved performance was observed. Comparing the three models with the seven-slice input, the 3D CNN model with a one-slice output outperforms the other models in terms of noise texture and homogeneity in liver parenchyma as well as subjective visualization of vessels.
    Conclusions: We conclude the that multislice input is an effective strategy for improving performance for 2D deep CNN denoising models. The pure 3D CNN model tends to have a better performance than the other models in terms of continuity across axial slices, but the difference was not significant compared with the 2D CNN model with the same number of slices as the input.
    Language English
    Publishing date 2023-01-31
    Publishing country United States
    Document type Journal Article
    ISSN 2329-4302
    ISSN 2329-4302
    DOI 10.1117/1.JMI.10.1.014003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Computed tomography imaging findings of nivolumab-induced thyroid dysfunction.

    Oki, Tatsuya / Inoue, Akitoshi / Nagatani, Yukihiro / Oki, Maya / Watanabe, Yoshiyuki

    Journal of clinical imaging science

    2022  Volume 12, Page(s) 22

    Abstract: The thyroid gland is most frequently involved in immune-related adverse events (irAEs) by nivolumab. We reviewed the thyroid function and thyroid gland volume and volume change ratio between baseline and follow-up CT (volume follow-up/volume baseline) in ...

    Abstract The thyroid gland is most frequently involved in immune-related adverse events (irAEs) by nivolumab. We reviewed the thyroid function and thyroid gland volume and volume change ratio between baseline and follow-up CT (volume follow-up/volume baseline) in 24 patients treated with nivolumab for lung cancer and renal cell carcinoma. Among them, four (16.7%) demonstrated nivolumab-induced thyroid dysfunction that shows either hypothyroidism or hyperthyroidism. Three and one cases were treated with nivolumab for lung cancer and renal cell carcinoma, respectively. Two patients with hypothyroidism (cases 1 and 2) showed reduced thyroid volume (volume change ratio: 0.80 and 0.84) on computed tomography (CT) images. Besides, remarkably diminished CT attenuation of the thyroid gland was observed in a patient with hypothyroidism (case 2). One of the two patients with hyperthyroidism showed increased thyroid volume (volume change ratio: 1.32) (case 3), whereas no difference in the thyroid gland volume was observed between the previous and follow-up CT in another patient with hyperthyroidism (case 4). Thyroid volume change ratio >0.1 was observed even in 6 of 20 (30%) patients without thyroid dysfunction. Considering the wide use of nivolumab in cancer treatment, radiologists should be aware that changes in the thyroid volume and attenuation on CT are associated with thyroid dysfunction caused by nivolumab, as well as thyroid volume may change even in patients with normal thyroid function during nivolumab therapy.
    Language English
    Publishing date 2022-05-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2601233-9
    ISSN 2156-5597 ; 2156-7514
    ISSN (online) 2156-5597
    ISSN 2156-7514
    DOI 10.25259/JCIS_194_2021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Correlation between intraocular pressure reduction and anterior chamber aqueous flare after micropulse transscleral cyclophotocoagulation.

    Kimura, Akitoshi / Nakashima, Kei-Ichi / Inoue, Toshihiro

    BMC ophthalmology

    2021  Volume 21, Issue 1, Page(s) 266

    Abstract: Background: Micropulse transscleral cyclophotocoagulation (MP-CPC) is a technique that has been approved in recent years to treat glaucoma. MP-CPC causes anterior chamber inflammation; a relationship with reduced intraocular pressure (IOP) has not been ... ...

    Abstract Background: Micropulse transscleral cyclophotocoagulation (MP-CPC) is a technique that has been approved in recent years to treat glaucoma. MP-CPC causes anterior chamber inflammation; a relationship with reduced intraocular pressure (IOP) has not been reported. Therefore, we analyzed the correlation between IOP and anterior chamber aqueous flare after MP-CPC.
    Methods: This retrospective study included 37 eyes of 37 patients who underwent MP-CPC between November 2018 and October 2020. IOP and flare values were measured at 1, 4, and 12 weeks after MP-CPC. Correlations were assessed between the percentage IOP reduction and flare elevation by calculating Spearman's rank correlation coefficient.
    Results: The percentage IOP reduction at 1 week after surgery was correlated with the flare elevation at 1 week after surgery (ρ = 0.47, P = 0.006). The percentage IOP reduction at 12 weeks after surgery was correlated with the flare elevation at 4 weeks after surgery (ρ = 0.53, P = 0.006).
    Conclusions: A short-term correlation was implied between reduced IOP and flare elevation after MP-CPC.
    MeSH term(s) Anterior Chamber ; Aqueous Humor ; Ciliary Body/surgery ; Humans ; Intraocular Pressure ; Laser Coagulation ; Retrospective Studies ; Treatment Outcome ; Visual Acuity
    Language English
    Publishing date 2021-06-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2050436-6
    ISSN 1471-2415 ; 1471-2415
    ISSN (online) 1471-2415
    ISSN 1471-2415
    DOI 10.1186/s12886-021-02012-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Photon-counting CT in Thoracic Imaging: Early Clinical Evidence and Incorporation Into Clinical Practice.

    Fletcher, Joel G / Inoue, Akitoshi / Bratt, Alex / Horst, Kelly K / Koo, Chi Wan / Rajiah, Prabhakar Shantha / Baffour, Francis I / Ko, Jane P / Remy-Jardin, Martine / McCollough, Cynthia H / Yu, Lifeng

    Radiology

    2024  Volume 310, Issue 3, Page(s) e231986

    Abstract: Photon-counting CT (PCCT) is an emerging advanced CT technology that differs from conventional CT in its ability to directly convert incident x-ray photon energies into electrical signals. The detector design also permits substantial improvements in ... ...

    Abstract Photon-counting CT (PCCT) is an emerging advanced CT technology that differs from conventional CT in its ability to directly convert incident x-ray photon energies into electrical signals. The detector design also permits substantial improvements in spatial resolution and radiation dose efficiency and allows for concurrent high-pitch and high-temporal-resolution multienergy imaging. This review summarizes
    MeSH term(s) Child ; Humans ; Tomography, X-Ray Computed ; Image Processing, Computer-Assisted ; Photons ; Radiology
    Language English
    Publishing date 2024-03-19
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 80324-8
    ISSN 1527-1315 ; 0033-8419
    ISSN (online) 1527-1315
    ISSN 0033-8419
    DOI 10.1148/radiol.231986
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Ue I Zs.106: Show issues Location:
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  10. Article ; Online: Lipid Droplets in the Basal Cistern and Ventricles.

    Maeda, Kengo / Inoue, Akitoshi / Hirano, Shingo / Sugihara, Yoshiko

    Internal medicine (Tokyo, Japan)

    2018  Volume 57, Issue 19, Page(s) 2913–2914

    Language English
    Publishing date 2018-05-18
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 32371-8
    ISSN 1349-7235 ; 0021-5120 ; 0918-2918
    ISSN (online) 1349-7235
    ISSN 0021-5120 ; 0918-2918
    DOI 10.2169/internalmedicine.0851-18
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