Radiology, Nuclear Medicine & Medical Imaging

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Article Radiology, Nuclear Medicine & Medical Imaging

68Ga-DOTA-FAPI-04 PET/MR in the Evaluation of Gastric Carcinomas: Comparison with 18F-FDG PET/CT

Chunxia Qin, Fuqiang Shao, Yongkang Gai, Qingyao Liu, Weiwei Ruan, Fang Liu, Fan Hu, Xiaoli Lan

Summary: The study evaluated the performance of Ga-68-FAPI PET/MR in diagnosing primary tumors and metastatic lesions in patients with gastric carcinomas, comparing it with F-18-FDG PET/CT. The results showed that Ga-68-FAPI PET/MR outperformed F-18-FDG PET/CT in detecting primary tumors and most metastatic lesions, suggesting its potential as a replacement for F-18-FDG PET/CT.

JOURNAL OF NUCLEAR MEDICINE (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Coronary CT Angiography with Photon-counting CT: First-In-Human Results

Salim A. Si-Mohamed, Sara Boccalini, Hugo Lacombe, Adja Diaw, Mohammad Varasteh, Pierre-Antoine Rodesch, Riham Dessouky, Marjorie Villien, Valerie Tatard-Leitman, Thomas Bochaton, Philippe Coulon, Yoad Yagil, Elias Lahoud, Klaus Erhard, Benjamin Riche, Eric Bonnefoy, Gilles Rioufol, Gerard Finet, Cyrille Bergerot, Loic Boussel, Joel Greffier, Philippe C. Douek

Summary: The study compared the quality of coronary CT angiography (CCTA) scans obtained with a photon-counting CT (PCCT) system and an energy-integrating dual-layer CT (DLCT) system. The results showed that PCCT provided improved image quality and diagnostic confidence compared to DLCT.

RADIOLOGY (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

A Guide to ComBat Harmonization of Imaging Biomarkers in Multicenter Studies

Fanny Orlhac, Jakoba J. Eertink, Anne-Segolene Cottereau, Josee M. Zijlstra, Catherine Thieblemont, Michel Meignan, Ronald Boellaard, Irene Buvat

Summary: The impact of PET image acquisition and reconstruction parameters on SUV measurements or radiomic feature values is discussed in this article. The use of the ComBat method to reduce the scanner effect is explained with practical examples. Situations where the ComBat assumptions are not met and should not be used are also presented.

JOURNAL OF NUCLEAR MEDICINE (2022)

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Article Oncology

Stereotactic Radiation for the Comprehensive Treatment of Oligometastases (SABR-COMET): Extended Long-Term Outcomes

Stephen Harrow, David A. Palma, Robert Olson, Stewart Gaede, Alexander V. Louie, Cornelis Haasbeek, Liam Mulroy, Michael Lock, George B. Rodrigues, Brian P. Yaremko, Devin Schellenberg, Belal Ahmad, Sashendra Senthi, Anand Swaminath, Neil Kopek, Mitchell Liu, Roel Schlijper, Glenn S. Bauman, Joanna Laba, X. Melody Qu, Andrew Warner, Suresh Senan

Summary: This study evaluates the effect of ablative therapies in patients with oligometastases over a long-term randomized period. The results indicate that Stereotactic Ablative Radiotherapy (SABR) can significantly improve overall survival and progression-free survival without new major toxicity signals during extended follow-up.

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS (2022)

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Review Radiology, Nuclear Medicine & Medical Imaging

Review and consensus recommendations on clinical APT-weighted imaging approaches at 3T: Application to brain tumors

Jinyuan Zhou, Moritz Zaiss, Linda Knutsson, Phillip Zhe Sun, Sung Soo Ahn, Silvio Aime, Peter Bachert, Jaishri O. Blakeley, Kejia Cai, Michael A. Chappell, Min Chen, Daniel F. Gochberg, Steffen Goerke, Hye-Young Heo, Shanshan Jiang, Tao Jin, Seong-Gi Kim, John Laterra, Daniel Paech, Mark D. Pagel, Ji Eun Park, Ravinder Reddy, Akihiko Sakata, Sabine Sartoretti-Schefer, A. Dean Sherry, Seth A. Smith, Greg J. Stanisz, Pia C. Sundgren, Osamu Togao, Moriel Vandsburger, Zhibo Wen, Yin Wu, Yi Zhang, Wenzhen Zhu, Zhongliang Zu, Peter C. M. van Zijl

Summary: This paper reviews the current clinical APTw imaging approaches and provides recommendations for optimizing APTw brain tumor imaging. These recommendations will help achieve uniform clinical application and interpretation, and facilitate multi-center trials and routine clinical use.

MAGNETIC RESONANCE IN MEDICINE (2022)

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Article Computer Science, Interdisciplinary Applications

Bidirectional Mapping Generative Adversarial Networks for Brain MR to PET Synthesis

Shengye Hu, Baiying Lei, Shuqiang Wang, Yong Wang, Zhiguang Feng, Yanyan Shen

Summary: This paper proposes a 3D end-to-end synthesis network called BMGAN for synthesizing PET images from brain MR images. The method utilizes a bidirectional mapping mechanism and employs a 3D Dense-UNet generator architecture and hybrid loss functions to generate high-quality cross-modality synthetic images while preserving the diverse brain structures of different subjects.

IEEE TRANSACTIONS ON MEDICAL IMAGING (2022)

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Article Biophysics

DIMENSION: Dynamic MR imaging with both k-space and spatial prior knowledge obtained via multi-supervised network training

Shanshan Wang, Ziwen Ke, Huitao Cheng, Sen Jia, Leslie Ying, Hairong Zheng, Dong Liang

Summary: This paper proposes a dynamic MR imaging method, named DIMENSION, which integrates both k-space and spatial prior knowledge via multi-supervised network training. It achieves improved reconstruction results in shorter time.

NMR IN BIOMEDICINE (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Fibroblast activation protein targeted therapy using [177Lu]FAPI-46 compared with [225Ac]FAPI-46 in a pancreatic cancer model

Yuwei Liu, Tadashi Watabe, Kazuko Kaneda-Nakashima, Yoshifumi Shirakami, Sadahiro Naka, Kazuhiro Ooe, Atsushi Toyoshima, Kojiro Nagata, Uwe Haberkorn, Clemens Kratochwil, Atsushi Shinohara, Jun Hatazawa, Frederik Giesel

Summary: This study suggests the potential application of FAPI radioligand therapy in FAP-expressing pancreatic cancer, but further evaluation is needed to identify the best radionuclide with a shorter half-life, as well as combination with therapies targeting tumor cells directly.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

High-Pitch Photon-Counting Detector Computed Tomography Angiography of the Aorta Intraindividual Comparison to Energy-Integrating Detector Computed Tomography at Equal Radiation Dose

Andre Euler, Kai Higashigaito, Victor Mergen, Thomas Sartoretti, Bettina Zanini, Bernhard Schmidt, Thomas G. Flohr, Stefan Ulzheimer, Matthias Eberhard, Hatem Alkadhi

Summary: The study aimed to compare the objective and subjective image quality of high-pitch PCD-CT and conventional EID-CT of the aorta at the same radiation dose. The results showed that high-pitch PCD-CT with VMI at 40 and 45 keV had significantly higher CNR compared to EID-CT with ATVS at matched radiation dose. The CNR gain of PCD-CT was more pronounced in overweight patients. A trade-off between objective and subjective image quality was found with VMI at 45 to 50 keV.

INVESTIGATIVE RADIOLOGY (2022)

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Article Computer Science, Artificial Intelligence

Ms RED: A novel multi-scale residual encoding and decoding network for skin lesion segmentation

Duwei Dai, Caixia Dong, Songhua Xu, Qingsen Yan, Zongfang Li, Chunyan Zhang, Nana Luo

Summary: Computer-Aided Diagnosis (CAD) for dermatological diseases is an important application of deep learning technologies, and the proposed Multi-scale Residual Encoding and Decoding network (Ms RED) shows superior performance in accurately segmenting skin lesions. Experimental results demonstrate that Ms RED outperforms several state-of-the-art methods in popular evaluation criteria.

MEDICAL IMAGE ANALYSIS (2022)

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Article Acoustics

ISUOG Practice Guidelines (updated): performance of the routine mid-trimester fetal ultrasound scan

L. J. Salomon, Z. Alfirevic, V Berghella, C. M. Bilardo, G. E. Chalouhi, F. Da Silva Costa, E. Hernandez-Andrade, G. Malinger, H. Munoz, D. Paladini, F. Prefumo, A. Sotiriadis, A. Toi, W. Lee

ULTRASOUND IN OBSTETRICS & GYNECOLOGY (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

CT Lung Abnormalities after COVID-19 at 3 Months and 1 Year after Hospital Discharge

Bavithra Vijayakumar, James Tonkin, Anand Devaraj, Keir E. J. Philip, Christopher M. Orton, Sujal R. Desai, Pallav L. Shah

Summary: COVID-19 survivors may experience persistent breathlessness and cough symptoms within 1 year after discharge. Chest CT scans showed persistent abnormalities in 56% of patients, with signs of fibrosis in a minority. Factors associated with more severe acute disease may contribute to CT abnormalities at 3-month follow-up.

RADIOLOGY (2022)

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Article Oncology

Radiation Therapy for Brain Metastases: An ASTRO Clinical Practice Guideline

Vinai Gondi, Glenn Bauman, Lisa Bradfield, Stuart H. Burri, Alvin R. Cabrera, Danielle A. Cunningham, Bree R. Eaton, Jona A. Hattangadi-Gluth, Michelle M. Kim, Rupesh Kotecha, Lianne Kraemer, Jing Li, Seema Nagpal, Chad G. Rusthoven, John H. Suh, Wolfgang A. Tome, Tony J. C. Wang, Alexandra S. Zimmer, Mateo Ziu, Paul D. Brown

Summary: This article presents the latest guidelines for the management of brain metastases, including advanced radiation therapy techniques and systemic therapies with central nervous system activity. The guidelines are based on a systematic review and provide recommendations using a predefined consensus-building methodology and grading system. Strong recommendations are made for the use of stereotactic radiosurgery (SRS) and upfront local therapy, with conditional recommendations for surgical resection and safe deferral of local therapy. Additional recommendations are made for patients with limited metastases and favorable prognosis.

PRACTICAL RADIATION ONCOLOGY (2022)

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Article Oncology

External Beam Radiation Therapy for Primary Liver Cancers: An ASTRO Clinical Practice Guideline

Smith Apisarnthanarax, Aisling Barry, Minsong Cao, Brian Czito, Ronald DeMatteo, Mary Drinane, Christopher L. Hallemeier, Eugene J. Koay, Foster Lasley, Jeffrey Meyer, Dawn Owen, Jennifer Pursley, Stephanie K. Schaub, Grace Smith, Neeta K. Venepalli, Gazi Zibari, Higinia Cardenes

Summary: This guideline provides evidence-based recommendations for external beam radiation therapy in hepatocellular carcinoma and intrahepatic cholangiocarcinoma, covering indications, techniques, outcomes, and emphasizing multidisciplinary care. Future studies should focus on defining the role of EBRT in the context of liver directed and systemic therapies.

PRACTICAL RADIATION ONCOLOGY (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Reproducibility of diffusion tensor image analysis along the perivascular space (DTI-ALPS) for evaluating interstitial fluid diffusivity and glymphatic function: CHanges in Alps index on Multiple conditiON acquIsition eXperiment (CHAMONIX) study

Toshiaki Taoka, Rintaro Ito, Rei Nakamichi, Koji Kamagata, Mayuko Sakai, Hisashi Kawai, Toshiki Nakane, Takashi Abe, Kazushige Ichikawa, Junko Kikuta, Shigeki Aoki, Shinji Naganawa

Summary: The study evaluated the reproducibility of the DTI-ALPS method and the impact of modifications in the imaging method and data evaluation, finding high reproducibility under a fixed imaging sequence. Bilateral ROI placement showed higher reproducibility, while modifications in the imaging plane and head position impaired reproducibility. The number of motion-proving gradients affected the ALPS-index value.

JAPANESE JOURNAL OF RADIOLOGY (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Fibroblast Activation Protein-Specific PET/CT Imaging in Fibrotic Interstitial Lung Diseases and Lung Cancer: A Translational Exploratory Study

Manuel Roehrich, Dominik Leitz, Frederik M. Glatting, Annika K. Wefers, Oliver Weinheimer, Paul Flechsig, Nicolas Kahn, Marcus A. Mall, Frederik L. Giesel, Clemens Kratochwil, Peter E. Huber, Andreas von Deimling, Claus Peter Heussel, Hans Ulrich Kauczor, Michael Kreuter, Uwe Haberkorn

Summary: This study aimed to evaluate the imaging properties of static and dynamic fibroblast activation protein (FAP) inhibitor (FAPI) PET/CT in various types of fibrosing interstitial lung diseases (fILDs) and lung cancer (LC). The results showed that Ga-68-FAPI PET/CT imaging had high uptake and good imaging characteristics for fILD and LC.

JOURNAL OF NUCLEAR MEDICINE (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Radiobiology of the FLASH effect

Anna A. Friedl, Kevin M. Prise, Karl T. Butterworth, Pierre Montay-Gruel, Vincent Favaudon

Summary: Studies have shown differential radiobiological responses to ultrahigh dose rate (UHDR) radiation exposures compared to conventional dose rates, leading to exploration of the therapeutic advantages of FLASH-RT. The underlying molecular and cellular mechanisms of the FLASH effect remain to be fully elucidated.

MEDICAL PHYSICS (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Neuropsychologic Profiles and Cerebral Glucose Metabolism in Neurocognitive Long COVID Syndrome

Andrea Dressing, Tobias Bormann, Ganna Blazhenets, Nils Schroeter, Lea Walter, Johannes Thurow, Dietrich August, Hanna Hilger, Katarina Stete, Kathrin Gerstacker, Susan Arndt, Alexander Rau, Horst Urbach, Siegbert Rieg, Dirk Wagner, Cornelius Weiller, Philipp T. Meyer, Jonas A. Hosp

Summary: During the long-term phase after COVID-19 infection, patients may experience cognitive deficits and fatigue. In this study, cognitive testing and brain glucose metabolism imaging showed minor impairments in cognitive domains and no distinct pathological changes. This differs from previous findings in subacute COVID-19 patients and may be related to the high prevalence of fatigue.

JOURNAL OF NUCLEAR MEDICINE (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

Chest CT Patterns from Diagnosis to 1 Year of Follow-up in Patients with COVID-19

Feng Pan, Lian Yang, Bo Liang, Tianhe Ye, Lingli Li, Lin Li, Dehan Liu, Jiazheng Wang, Richard L. Hesketh, Chuansheng Zheng

Summary: This study assessed the chest CT manifestations of COVID-19 up to 1 year after symptom onset. The study found that 61% of patients had resolved CT abnormalities at 3 months and the number increased to 75% at 12 months. The risk factors for residual CT abnormalities at 1 year were age 50 or older, lymphopenia, and severe or aggravation of acute respiratory distress syndrome.

RADIOLOGY (2022)

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Article Radiology, Nuclear Medicine & Medical Imaging

EANM procedure guidelines for brain PET imaging using [18F]FDG, version 3

Eric Guedj, Andrea Varrone, Ronald Boellaard, Nathalie L. Albert, Henryk Barthel, Bart van Berckel, Matthias Brendel, Diego Cecchin, Ozgul Ekmekcioglu, Valentina Garibotto, Adriaan A. Lammertsma, Ian Law, Ivan Penuelas, Franck Semah, Tatjana Traub-Weidinger, Elsmarieke van de Giessen, Donatienne Van Weehaeghe, Silvia Morbelli

Summary: The guidelines summarize the current views of the EANM Neuro-Imaging Committee on [F-18]FDG-PET imaging of the brain, aiming to improve diagnostic impact in neurological, neurosurgical, and psychiatric practice. Updates include advances in PET technology, the impact of hyperglycemia in patients undergoing brain [F-18]FDG-PET, and typical brain metabolic patterns for neurodegenerative diseases.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING (2022)

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