Radiographics最新文献

Erratum for: Quality Improvement Report: The Sliding Sign Initiative-Facilitating Earlier Detection of Deep Endometriosis in an Academic US Department.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.249013

Emily H T Pang, Caroline E Lee, Abigail Lee, Esraa A Khalifa

引用次数: 0

CT Angiography of the Upper Extremities: Review of Acute Arterial Entities.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.240077

Daniel D Friedman, Michael J Ponkowski, Anup Shashindra Shetty, Mark Jeffrey Hoegger, Malak Itani, Mohamed Z Rajput, Vincent M Mellnick, Constantine Apostolos Raptis, Benjamin E Northrup, David Ballard, Jorge A Cabrera Lebron, Richard Tsai

{"title":"CT Angiography of the Upper Extremities: Review of Acute Arterial Entities.","authors":"Daniel D Friedman, Michael J Ponkowski, Anup Shashindra Shetty, Mark Jeffrey Hoegger, Malak Itani, Mohamed Z Rajput, Vincent M Mellnick, Constantine Apostolos Raptis, Benjamin E Northrup, David Ballard, Jorge A Cabrera Lebron, Richard Tsai","doi":"10.1148/rg.240077","DOIUrl":"https://doi.org/10.1148/rg.240077","url":null,"abstract":"Historically, evaluation of the upper extremity vasculature was performed using digital subtraction angiography. With the advancement of cross-sectional imaging and submillimeter isotropic data acquisition, CT angiography (CTA) has become an excellent noninvasive diagnostic tool for evaluation of the vasculature of the upper extremities. CTA allows quick evaluation of vessel patency and irregularity and achievement of the anatomic detail needed in preoperative planning. When interpreting CTA of the upper extremities, radiologists must be familiar with the normal vascular anatomy, common vascular anomalies, and pitfalls or artifacts that may mimic or mask abnormality. In this review, the authors provide an overview of the utility of CTA of the upper extremities. Also discussed are CTA techniques and the use of several newer technologies including dual-energy and photon-counting detector CT. The utility of CTA in patients with upper extremity trauma is explored, with a focus on assessing vascular injury. Other vascular abnormalities including infection, acute limb ischemia, and vasculitis are discussed. It is imperative for radiologists to be accustomed to CTA of the upper extremities in diagnosing acute vascular abnormalities and to recognize common pitfalls and mimics of these abnormalities. ©RSNA, 2025 Supplemental material is available for this article.","PeriodicalId":54512,"journal":{"name":"Radiographics","volume":"45 1","pages":"e240077"},"PeriodicalIF":5.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Artifacts at Cardiac MRI: Imaging Appearances and Solutions.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.230200

Prabhakar Shantha Rajiah, Baskaran Sundaram, Ming Yen Ng, Praveen Ranganath, Philip A Araoz, Michael A Bolen

{"title":"Artifacts at Cardiac MRI: Imaging Appearances and Solutions.","authors":"Prabhakar Shantha Rajiah, Baskaran Sundaram, Ming Yen Ng, Praveen Ranganath, Philip A Araoz, Michael A Bolen","doi":"10.1148/rg.230200","DOIUrl":"https://doi.org/10.1148/rg.230200","url":null,"abstract":"Cardiac MRI (CMR) is an important imaging modality in the evaluation of cardiovascular diseases. CMR image acquisition is technically challenging, which in some circumstances is associated with artifacts, both general as well as sequence specific. Recognizing imaging artifacts, understanding their causes, and applying effective approaches for artifact mitigation are critical for successful CMR. Balanced steady-state free precession (bSSFP), the most common CMR sequence, is associated with band and flow artifacts, which are amplified at 3-T imaging. This can be mitigated by targeted shimming, by short repetition time, or by using a frequency-scout sequence. In patients with cardiac arrhythmias or poor breath hold, the quality of cine imaging can be improved with a non-electrocardiographically gated free-breathing real-time sequence. Motion artifacts on late gadolinium enhancement (LGE) images can be mitigated by using single-shot technique with motion compensation and signal averaging. LGE images are also prone to partial-volume averaging and incomplete myocardial nulling. In phase-contrast imaging, aliasing artifact is seen when the velocity of blood is higher than the encoded velocity. Aliasing can be mitigated by increasing the encoded velocity or using postprocessing software. In first-pass perfusion imaging, a dark rim artifact due to Gibbs ringing can be distinguished from a true perfusion defect based on earlier appearance and fading after a few cardiac cycles. With implanted cardiac devices, artifactual high signal intensity mimicking scar is seen on LGE images, which can be mitigated using a wide-band sequence. With devices and metallic artifacts, traditional gradient-recalled echo sequence has fewer artifacts than bSSFP. CMR at 3 T requires adaptation of sequences to minimize artifacts. ©RSNA, 2025 Supplemental material is available for this article.","PeriodicalId":54512,"journal":{"name":"Radiographics","volume":"45 1","pages":"e230200"},"PeriodicalIF":5.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nuclear Medicine Imaging in Epilepsy.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.240062

Aakanksha Sriwastwa, Andrew Timothy Trout, Bruce Wayne Mahoney, Lily L Wang, Jennifer L Scheler

{"title":"Nuclear Medicine Imaging in Epilepsy.","authors":"Aakanksha Sriwastwa, Andrew Timothy Trout, Bruce Wayne Mahoney, Lily L Wang, Jennifer L Scheler","doi":"10.1148/rg.240062","DOIUrl":"https://doi.org/10.1148/rg.240062","url":null,"abstract":"Approximately one-third of patients with focal epilepsy have medically refractory focal epilepsy (MRFE), which significantly impacts their quality of life. Once a seizure focus is identified and determined to be in the noneloquent cortex, it can be surgically resected with the goal of freedom from seizures and minimal neurocognitive deficit. During noninvasive (phase I) presurgical planning, functional (nuclear) imaging and structural imaging are complementary in the accurate localization of the epileptogenic zone (EZ). PET and SPECT are complementary functional imaging modalities. Fluorine 18-fluorodeoxyglucose PET shows hypometabolism in the EZ, while SPECT radiotracers are used to assess regional cerebral perfusion. Functional imaging plays a more important role in patients with nonlesional epilepsy (approximately one-third of patients with MRFE), in patients with multiple lesions, or in the setting of electrophysiologic-structural discordance. Nuclear medicine imaging also helps in evaluating the functional integrity of the rest of the brain and unmasking abnormalities that are not apparent at structural imaging before surgery. During invasive (phase II) evaluation, the EZ seen at functional imaging helps in guiding intracranial electrode placement. This review of nuclear medicine imaging of epilepsy is focused on the radiotracers used, imaging acquisition and postprocessing, commonly encountered causes of MRFE in adults and children, radiologic appearances of MRFE, imaging artifacts, and interpretation pitfalls. The goal is to guide radiologists in optimally performing and interpreting these studies for effective multidisciplinary discussions of these complex patient cases. ©RSNA, 2025 Supplemental material is available for this article.","PeriodicalId":54512,"journal":{"name":"Radiographics","volume":"45 1","pages":"e240062"},"PeriodicalIF":5.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RadioGraphics 2025: Reflections on Connection.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.249014

Christine Cooky Menias

引用次数: 0

2024 Panel Reviewers: A Note of Thanks.

IF 5.2 1区医学

Radiographics Pub Date : 2025-01-01 DOI: 10.1148/rg.249015

Christine Cooky Menias, Umar Mahmood

引用次数: 0

Congenital and Infantile Masses of the Head and Neck.

IF 5.2 1区医学

Radiographics Pub Date : 2024-12-01 DOI: 10.1148/rg.240059

Alexandra M Foust, Rekha Krishnasarma, Caroline D Robson, Elizabeth Snyder, Dann Martin, Katharyn D Cassella, Lindsey Johnstone, Joanne Rispoli, Sumit Pruthi, Asha Sarma

引用次数: 0

Quality Improvement Report: The Sliding Sign Initiative-Facilitating Earlier Detection of Deep Endometriosis in an Academic US Department. 质量改进报告：滑动标志倡议--促进美国学术部门更早地发现深部子宫内膜异位症。

IF 5.2 1区医学

Radiographics Pub Date : 2024-12-01 DOI: 10.1148/rg.240082

Emily H T Pang, Caroline E Lee, Abigail Lee, Esraa A Khalifa

{"title":"Quality Improvement Report: The Sliding Sign Initiative-Facilitating Earlier Detection of Deep Endometriosis in an Academic US Department.","authors":"Emily H T Pang, Caroline E Lee, Abigail Lee, Esraa A Khalifa","doi":"10.1148/rg.240082","DOIUrl":"10.1148/rg.240082","url":null,"abstract":"A delayed diagnosis of endometriosis can significantly impact a patient's quality of life. To facilitate an earlier diagnosis, we implemented a modified pelvic US protocol that included use of the dynamic sliding sign (SS) maneuver to screen at-risk populations. The aim of this initiative was to improve both SS maneuver performance and SS reporting consistency to 80% and determine the number of new endometriosis cases identified after US. A quality improvement framework based on the plan-do-study-act (PDSA) methodology was used to develop and evaluate interventions. Eligible pelvic US studies were reviewed at regular intervals to track SS maneuver performance and SS reporting, with control charts used to detect intervention-related variation. A chart review of all abnormal SS cases was also performed. The project initiation (PDSA cycle 1) included protocol development and educational sessions. Reminder posters were placed during cycle 2 and revised in cycle 3, and the eligibility criteria were revised. Cycles 4 and 5 consisted of in-person discussions, distribution of a reference guide, and creation of a dictation software macro. In terms of results, sonographers performed the SS maneuver correctly in 52.1% of eligible patients after cycle 1, increasing to 83.9% by cycle 5. In the cases in which the SS maneuver was performed by the sonographer, after PDSA cycle 1, the SS was reported by the radiologist in 69% of cases (including both correct and incorrect interpretations), and both reported and interpreted correctly in 59% of cases. Thirty-seven patients were newly diagnosed with endometriosis after undergoing US of the SS. The objectives of our SS initiative were met, with improved SS US performance, improved SS reporting and interpretation, and a number of new endometriosis cases diagnosed. ©RSNA, 2024 Supplemental material is available for this article. See the invited commentary by Jha and VanBuren in this issue.","PeriodicalId":54512,"journal":{"name":"Radiographics","volume":"44 12","pages":"e240082"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142689708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum for: Imaging of Upper Tract Urothelial Carcinoma.

IF 5.2 1区医学

Radiographics Pub Date : 2024-12-01 DOI: 10.1148/rg.249011

Hirotsugu Nakai, Hiroaki Takahashi, Clinton V Wellnitz, Melissa L Stanton, Naoki Takahashi, Akira Kawashima

引用次数: 0

US of Acute Tendon Tears.

IF 5.2 1区医学

Radiographics Pub Date : 2024-12-01 DOI: 10.1148/rg.240060

Lisa M Billone, Sarah J Allred, Dyan V Flores

{"title":"US of Acute Tendon Tears.","authors":"Lisa M Billone, Sarah J Allred, Dyan V Flores","doi":"10.1148/rg.240060","DOIUrl":"https://doi.org/10.1148/rg.240060","url":null,"abstract":"US is an effective tool for appraising acute tendon injury, allowing rapid evaluation of symptoms at bedside and paving the way for prompt diagnosis and treatment selection. It offers three main advantages in the acute or emergent setting. First, it is more sensitive and specific than physical examination. This is beneficial in tendons such as the distal triceps wherein incomplete and complete tears may manifest with similar clinical presentations. Tendon injury may also be clinically innocuous because bruising or a palpable defect is not always present and swelling may mask palpation of the tendon gap. Second, US provides important descriptors that may affect treatment selection, such as injury site, injury extent, and length of retraction. Pectoralis major tears at the tendon or musculotendinous junction warrant operative referral and are readily illustrated at US. A torn distal biceps tendon with significant retraction may require additional graft augmentation rather than reattachment to the insertion alone. Soleus and gastrocnemius strains may mimic each other clinically. Although both are managed conservatively, distinction between the two facilitates formulation of a specific rehabilitation regimen. Finally, US can narrow the differential diagnosis and rule out mimics of musculoskeletal abnormalities. Nonmusculoskeletal conditions, such as deep venous thrombosis and a ruptured Baker cyst, can manifest with the same clinical presentation as acute calf injuries and must be considered in a patient presenting with sudden calf, posterior leg, or ankle pain. The authors review the anatomic features, US techniques, and imaging findings of acute tendon injuries to aid in meaningful reporting and timely treatment selection. ©RSNA, 2024 Supplemental material is available for this article.","PeriodicalId":54512,"journal":{"name":"Radiographics","volume":"44 12","pages":"e240060"},"PeriodicalIF":5.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142755432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0