Tatsushi Oura, Hiroyuki Tatekawa, Daisuke Horiuchi, Shu Matsushita, Hirotaka Takita, Natsuko Atsukawa, Yasuhito Mitsuyama, Atsushi Yoshida, Kazuki Murai, Rikako Tanaka, Taro Shimono, Akira Yamamoto, Yukio Miki, Daiju Ueda
PURPOSE: The performance of vision-language models (VLMs) with image interpretation capabilities, such as GPT-4 omni (GPT-4o), GPT-4 vision (GPT-4V), and Claude-3, has not been compared and remains unexplored in specialized radiological fields, including nuclear medicine and interventional radiology. This study aimed to evaluate and compare the diagnostic accuracy of various VLMs, including GPT-4 + GPT-4V, GPT-4o, Claude-3 Sonnet, and Claude-3 Opus, using Japanese diagnostic radiology, nuclear medicine, and interventional radiology (JDR, JNM, and JIR, respectively) board certification tests...
July 20, 2024: Japanese Journal of Radiology
Yuko Tsujioka, Gen Nishimura, Eugene Nishi, Tatsuo Kono, Taiki Nozaki, Masahiro Hashimoto, Yoshitake Yamada, Masahiro Jinzaki
Childhood interstitial lung diseases (chILDs) encompass a diverse group of disorders with a high mortality rate and severe respiratory morbidities. Recent investigations have revealed that the classification of adult ILDs is not valid for chILDs, particularly for ILDs of early onset. Therefore, Children's Interstitial Lung Disease Research Cooperative of North America proposed a new classification of chILDs for affected children under 2 years of age, and later another classification for affected individuals between 2 and 18 years of age...
July 16, 2024: Japanese Journal of Radiology
Maryam Saed, Hojjat Mahani, Alireza Sadremomtaz
PURPOSE: Collimator-detector response function (CDRF) of a SPECT scanner refers to the image generated from a point source of activity. This research aims to characterize the CDRF of a breast-dedicated SPECT imager equipped with a lofthole collimator using GATE Monte Carlo simulation. MATERIALS AND METHODS: To do so, a cylindrical multi-lofthole collimation system with lofthole apertures dedicated to breast imaging was modeled using the GATE Monte Carlo simulator...
July 2, 2024: Japanese Journal of Radiology
Yuki Sonoda, Ryo Kurokawa, Yuta Nakamura, Jun Kanzawa, Mariko Kurokawa, Yuji Ohizumi, Wataru Gonoi, Osamu Abe
PURPOSE: Large language models (LLMs) are rapidly advancing and demonstrating high performance in understanding textual information, suggesting potential applications in interpreting patient histories and documented imaging findings. As LLMs continue to improve, their diagnostic abilities are expected to be enhanced further. However, there is a lack of comprehensive comparisons between LLMs from different manufacturers. In this study, we aimed to test the diagnostic performance of the three latest major LLMs (GPT-4o, Claude 3 Opus, and Gemini 1...
July 1, 2024: Japanese Journal of Radiology
Nobuhiko Kamitani, Kenta Watanabe, Naoki Ikeda, Yujiro Kawata, Ryoji Tokiya, Takafumi Hayashi, Yoshiyuki Miyaji, Tsutomu Tamada, Kuniaki Katsui
PURPOSE: Until March 2018, patients with high-risk localized prostate cancer had been administered high-dose-rate brachytherapy (HDR-BT) combined with external beam radiotherapy (EBRT) without additional hormone therapy (HT) at our institution. In this study, we aimed to evaluate long-term outcomes of this treatment. MATERIALS AND METHODS: Patients with prostate cancer who received HDR-BT and EBRT between April 1997 and March 2021 and who were followed up for at least 6 months were included in the study...
June 29, 2024: Japanese Journal of Radiology
Daisuke Tsurumaru, Yusuke Nishimuta, Katsuya Nanjo, Satohiro Kai, Mitsutoshi Miyasaka, Toshio Muraki, Kousei Ishigami
PURPOSE: The aim of this study was to compare the accuracy of colonoscopy (CS) and CT colonography (CTC) in the measurement of colorectal polyps using pathological size as a reference. MATERIALS AND METHODS: The analysis included 61 colorectal polyps in 28 patients who underwent preoperative CTC at our institution. All polyps were endoscopically resected. Polyp sizes were measured by CS and CTC. Endoscopic polyp size was extracted from endoscopy records written by one of two endoscopists (A with 11 and B with 6 years of endoscopic experience, respectively), who estimated the size visually/categorically without any measuring devices...
June 29, 2024: Japanese Journal of Radiology
Juan Wang, Tongyin Zhang, Haoyu Li, Yuwan Hu, Yanyan Xu, Zhenguo Huang, Sheng Xie, Meng Yang, Hongliang Sun
OBJECTIVES: To investigate the diagnostic performance and complication rates of percutaneous transthoracic CT-guided coaxial core needle biopsy (PTCNB) in persistent consolidations and evaluate its safety in routine clinical practice. METHODS: A total of 685 patients (404 males, 281 females) underwent PTCNB with coaxial core technique for persisted consolidation were reviewed in this study. According to histopathological and microbiological analysis, the results of biopsy specimens were categorized as follows: malignant, specific benign, non-specific benign and non-diagnostic...
June 28, 2024: Japanese Journal of Radiology
Yuichiro Hirano, Shouhei Hanaoka, Takahiro Nakao, Soichiro Miki, Tomohiro Kikuchi, Yuta Nakamura, Yukihiro Nomura, Takeharu Yoshikawa, Osamu Abe
No abstract text is available yet for this article.
June 28, 2024: Japanese Journal of Radiology
Satoyuki Ogawa, Akira Yamamoto, Atsushi Jogo, Ken Kageyama, Etsuji Sohgawa, Go Ohira, Kenjiro Kimura, Shogo Tanaka, Ryosuke Amano, Shigekazu Takemura, Takeaki Ishizawa, Yukio Miki
PURPOSE: To evaluate the efficacy and safety of embolization with or without portal vein stenting for bleeding ectopic jejunal varices in the hepatopetal portal collateral due to extrahepatic portal vein occlusion or stenosis after hepatobiliary and pancreatic surgery. MATERIALS AND METHODS: This study included consecutive patients who underwent embolization for bleeding ectopic jejunal varices in the hepatopetal collateral due to extrahepatic portal vein occlusion or stenosis after hepatobiliary and pancreatic surgery between September 2012 and December 2020...
June 27, 2024: Japanese Journal of Radiology
Maoyuan Mu, Tengchao Zhou, Huanqing Guo, Xiaobo Fu, Zixiong Chen, Weiwei Jiang, Lixue Li, Han Qi, Fei Gao
PURPOSE: Refractory hepatic encephalopathy (RHE) can occur as a consequence of excessive shunting following the creation of a transjugular intrahepatic portosystemic shunt (TIPS). We describe a technique that utilizes a suture-constrained covered stent for shunt reduction to treat TIPS-related RHE. MATERIALS AND METHODS: Between January 2017 and September 2023, 25 patients with TIPS-related RHE who underwent shunt reduction utilizing a suture-constrained covered stent were reviewed...
June 26, 2024: Japanese Journal of Radiology
Naoya Ishibashi, Masaharu Hata, Atsushi Fujikawa, Takao Mochizuki, Toshiya Maebayashi, Masahiro Okada
PURPOSE: To reduce the rectal radiation dose during local radiation therapy of prostate cancer, a hydrogel spacer is typically implanted between the prostate and rectum. However, the spacer volume can change during external beam radiation therapy (EBRT). Therefore, we used magnetic resonance imaging (MRI) to determine changes in the spacer volume during EBRT and analyzed the data to identify patient factors influencing this change. MATERIALS AND METHODS: A hydrogel spacer was implanted in each enrolled patient diagnosed with prostate cancer (n = 22, age = 69-86 years) for EBRT with a total dose of 70 Gy over 35 fractions...
June 26, 2024: Japanese Journal of Radiology
Shintaro Kimura, Miyuki Sone, Shunsuke Sugawara, Chihiro Itou, Mizuki Ozawa, Tetsufumi Sato, Yoshiyuki Matsui, Yasuaki Arai, Masahiko Kusumoto
PURPOSE: To evaluate the safety of propofol sedation administered by interventional radiologists during radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Propofol sedation was administered by interventional radiologists in 72 patients (85 procedures, 93 tumors) during RFA for HCC between August 2018 and December 2020. Interventional radiologists equipped with adequate knowledge and skills in sedation and respiratory management were responsible for sedation...
June 26, 2024: Japanese Journal of Radiology
Yukinori Okajima, Shin Yanagisawa, Akira Yamada, Tsuyoshi Notake, Akira Shimizu, Yuji Soejima, Yasunari Fujinaga
PURPOSE: To evaluate the predictive ability of combining Technetium-99m-galactosyl human serum albumin (99m Tc‑GSA) single-photon emission computed tomography (SPECT)/computed tomography (CT) volume and plasma clearance rate of indocyanine green (ICGK) for posthepatectomy liver failure (PHLF). MATERIALS AND METHODS: Fifty patients who underwent 99m Tc-GSA scintigraphy as a preoperative examination for segmentectomy or more from July 2021 to June 2023 were evaluated prospectively...
June 24, 2024: Japanese Journal of Radiology
Yasuhiro Sugai, Toshitada Hiraka, Akiko Shibata, Ayato Taketa, Taiyo Tanae, Yosuke Moriya, Masanori Komatsu, Chifumi Iseki, Yasuyuki Ohta, Masafumi Kanoto
PURPOSE: We examined whether time-course augmentation of perivascular space enlargement in the basal ganglia (BG-PVS) reflected cerebral small vessel disease (CSVD) severity by considering white matter hyperintensity lesion (WMHL) as an indicator for CSVD. MATERIALS AND METHODS: This study population included 416 older participants from a community-based cohort. They participated in magnetic resonance imaging (MRI) studies more than once during the study period...
June 19, 2024: Japanese Journal of Radiology
Yukichi Tanahashi, Koh Kubota, Takayuki Nomura, Takanobu Ikeda, Masaya Kutsuna, Satoshi Funayama, Tatsunori Kobayashi, Kumi Ozaki, Shintaro Ichikawa, Satoshi Goshima
PURPOSE: To evaluate the effect of deep learning reconstruction (DLR) on vascular depiction, tumor enhancement, and image quality of computed tomography hepatic arteriography (CTHA) images acquired during transcatheter arterial chemoembolization (TACE). METHODS: Institutional review board approval was obtained. Twenty-seven patients (18 men and 9 women, mean age, 75.7 years) who underwent CTHA immediately before TACE were enrolled. All images were reconstructed using three reconstruction algorithms: hybrid-iterative reconstruction (hybrid-IR), DLR with mild strength (DLR-M), and DLR with strong strength (DLR-S)...
June 18, 2024: Japanese Journal of Radiology
Akira Haga, Tae Iwasawa, Toshihiro Misumi, Koji Okudela, Tsuneyuki Oda, Hideya Kitamura, Tomoki Saka, Shoichiro Matsushita, Tomohisa Baba, Yayoi Natsume-Kitatani, Daisuke Utsunomiya, Takashi Ogura
PURPOSE: We aimed to identify computed tomography (CT) radiomics features that are associated with cellular infiltration and construct CT radiomics models predictive of cellular infiltration in patients with fibrotic ILD. MATERIALS AND METHODS: CT images of patients with ILD who underwent surgical lung biopsy (SLB) were analyzed. Radiomics features were extracted using artificial intelligence-based software and PyRadiomics. We constructed a model predicting cell counts in histological specimens, and another model predicting two classifications of higher or lower cellularity...
June 18, 2024: Japanese Journal of Radiology
Tomoki Imokawa, Kota Yokoyama, Kanae Takahashi, Jun Oyama, Junichi Tsuchiya, Nobuo Sanjo, Ukihide Tateishi
The findings of brain perfusion single-photon emission computed tomography (SPECT), which detects abnormalities often before changes manifest in morphological imaging, mainly reflect neurodegeneration and contribute to dementia evaluation. A major shift is about to occur in dementia practice to the approach of diagnosing based on biomarkers and treating with disease-modifying drugs. Accordingly, brain perfusion SPECT will be required to serve as a biomarker of neurodegeneration. Hypoperfusion in Alzheimer's disease (AD) is typically seen in the posterior cingulate cortex and precuneus early in the disease, followed by the temporoparietal cortices...
June 18, 2024: Japanese Journal of Radiology
Reza Dehdab, Andreas Brendlin, Sebastian Werner, Haidara Almansour, Sebastian Gassenmaier, Jan Michael Brendel, Konstantin Nikolaou, Saif Afat
PURPOSE: To assess the diagnostic accuracy of ChatGPT-4V in interpreting a set of four chest CT slices for each case of COVID-19, non-small cell lung cancer (NSCLC), and control cases, thereby evaluating its potential as an AI tool in radiological diagnostics. MATERIALS AND METHODS: In this retrospective study, 60 CT scans from The Cancer Imaging Archive, covering COVID-19, NSCLC, and control cases were analyzed using ChatGPT-4V. A radiologist selected four CT slices from each scan for evaluation...
June 13, 2024: Japanese Journal of Radiology
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