Radiology Physics Review Courses and Practice Exams

ACR Dose Index Registry Reaches Milestones: One Million Scans, 300 Facilities

Since its launch less than a year ago, more than one million computed tomography (CT) scans have been contributed to the American College of Radiology (ACR) Dose Index Registry (DIR) and compiled for analysis.

Diagnostic Imaging Services Access Protection Act Reaches 180 Co-sponsors

Four Congressmen recently added their names to the list of co-sponsors for H.R 3269, the Diagnostic Imaging Services Access Protection Act, bringing the list of co-sponsors to 180. Click on the headline above and follow the instructions to urge your Member of Congress to support H.R. 3269 today!

ACR Urges Conference Committee to Include H.R. 3269

On Friday, January 20, chairman of the American College of Radiology's (ACR) Board of Chancellors, John Patti, MD, FACR, sent a letter to the House and Senate conferees urging the inclusion of H.R. 3269, the Diagnostic Imaging Services Access Protection Act, within a forthcoming, long-term Medicare proposal.

ACR Members Now Have Free Access to Ethics and Professionalism Educational Modules

A new series of ethics and professionalism educational modules is available through this website. Each self-guided module was developed by experts, peer-reviewed for content, quality and clarity and includes self-testing features to assess comprehension.

ACR Asserts Integrity in Radiology

The American College of Radiology (ACR) is deeply troubled by implications of a recent CNN report involving the American Board of Radiology (ABR) certification examinations.

Call for Volunteers

Appointments to commissions, committees and task forces for service in 2012-2013 will be made this spring. If you would like to be considered for a position we will need to hear from you by February 29, 2012.

MPPR Policy Applied to Professional Component in 2012

The Centers for Medicare and Medicaid Services (CMS) will begin applying its Multiple Procedure Payment Reduction (MPPR) policy to the professional component (PC) of certain diagnostic imaging services (computed tomography, magnetic resonance imaging, and ultrasound).

E. Stephen Amis Jr., MD, Fellowship in Quality and Safety, Call for Applications

The ACR Department of Quality and Safety is accepting applications from second, third and fourth year residents and fellows for its Amis Fellowship. The deadline for submission of applications is March 31, 2012.

ACR Comments to CMS Regarding MPPR and Other Provisions in the Physician Fee Schedule Final Rule

The American College of Radiology (ACR) submitted official comments the Centers for Medicare and Medicaid Services' (CMS regarding the final rule of the Medicare Physician Fee Schedule.

American Journal of Roentgenology recent issues

Small Bowel Obstruction

Enhancing the Resident Experience With Global Health Electives

Ovarian Torsion: Diagnostic Features on CT and MRI With Pathologic Correlation

OBJECTIVE. The CT and MRI features of ovarian torsion are illustrated with gross pathologic correlation. Ovarian enlargement with or without an underlying mass is the finding most frequently associated with torsion, but it is nonspecific. A twisted pedicle, although not often detected on imaging, is pathognomonic when seen. Subacute ovarian hemorrhage and ab […]

Multidisciplinary Considerations in the Management of High-Risk Breast Lesions

OBJECTIVE. The purpose of this review is to discuss the controversy and lack of consensus in the management of high-risk breast lesions, including flat epithelial atypia, atypical ductal hyperplasia, lobular neoplasia, radial scar, papillary lesions, and mucocelelike lesions, after diagnosis with core needle biopsy. CONCLUSION. A single uniform approach may […]

Risk of Malignancy When Microscopic Radial Scars and Microscopic Papillomas Are Found at Percutaneous Biopsy

OBJECTIVE. The objective of our study was to assess the incidence of associated malignancy when microscopic radial scars and microscopic intraductal papillomas are encountered at percutaneous biopsy for lesions that otherwise reveal benign histopathology. MATERIALS AND METHODS. A search of the pathology database for the period from December 14, 2006, through […]

Subcutaneous Abdominal Wall Masses: Radiological Reasoning

OBJECTIVE. A 36-year-old woman presented to her primary care physician with right lower abdominal pain. Her physician subsequently requested a CT to rule out appendicitis. Contrast-enhanced CT was performed and revealed no evidence of appendicitis but showed two subcutaneous ovoid soft-tissue masses anterior to the rectus sheath in the upper pelvis. Pelvic M […]

Nonthrombotic Pulmonary Embolism

OBJECTIVE. The purpose of this essay is to highlight the clinical features and imaging findings associated with different types of nonthrombotic pulmonary embolism. CONCLUSION. Nonthrombotic pulmonary embolism is an infrequent condition with various causes that can be life-threatening pathologic conditions. The entity presents a diagnostic challenge because […]

A New MDCT Technique for the Detection and Anatomical Exploration of Urogenital Fistulas

OBJECTIVE. We tested a new MDCT technical protocol, combining IV and intravesical positive contrast agent and intravaginal neutral contrast agent, that optimizes exploration of urogenital fistulas. We examined three patients (four CT examinations in total) with this technique and proved that a preexisting subtle ureterovaginal fistula that was under treatmen […]

Chronologic Change in the Growth Plate After Radiofrequency-Induced Thermal Injury: MRI-Histologic Correlation

OBJECTIVE. The purposes of this study were to assess chronologic changes in normal growth plate after radiofrequency-induced thermal injury and to evaluate the feasibility of MRI for revealing alteration of the growth plate. MATERIALS AND METHODS. Radiofrequency ablation was performed on the right proximal tibia of 13 8-week-old New Zealand White rabbits. An […]

Meniscal Tear Configurations: Categorization With 3D Isotropic Turbo Spin-Echo MRI Compared With Conventional MRI at 3 T

OBJECTIVE. The purpose of our study was to compare the accuracy of 3D fat-suppressed isotropic turbo spin-echo (TSE) sequences using sampling perfection with application-optimized contrasts using different flip angle evolution (SPACE) with 2D conventional MRI at 3 T in determining meniscal tear types. MATERIALS AND METHODS. Sixty-nine patients with arthrosco […]

Correlation Between the Severity of Carpal Tunnel Syndrome and Color Doppler Sonography Findings

OBJECTIVE. Carpal tunnel syndrome (CTS) represents one of the most prevalent peripheral entrapment mononeuropathies. The purpose of our study was to assess the potential correlation between intraneural hypervascularization, flexor retinaculum bowing, and median nerve cross-sectional area and the severity of CTS in cases confirmed by nerve conduction study. S […]

Parotid Gland Tumors: Preliminary Data for the Value of FDG PET/CT Diagnostic Parameters

To Whom Is the Radiologist Responsible?

Interpreting After-Hours MRI and Ct Without Formatting

MRI of the Upper Extremity: Shoulder, Elbow, Wrist, and Hand

Breast Imaging: The Requisites, 2nd ed.

Role of Regional, Cultural, and Sex Differences in Delivering Bad News in Clinical Radiology: Evidence From a Developing Country

Editors and Reviewers: Roles and Responsibilities

Diagnosis and Management of High-Risk Breast Lesions: Aristotle's Dilemma

Imaging Features and Management of High-Risk Lesions on Contrast-Enhanced Dynamic Breast MRI

OBJECTIVE. Women at high risk for breast cancer and women with newly diagnosed breast cancer often undergo breast MRI. With the increasing availability of MRI-guided biopsy, high-risk lesions are not infrequently encountered. These high-risk lesions include atypical ductal hyperplasia, lobular carcinoma in situ, atypical lobular hyperplasia, papilloma, radia […]

American Journal of Roentgenology Chest Imaging

[Chest Imaging] Acute Traumatic Thoracic Aortic Injuries: Experience with 64-MDCT

OBJECTIVE. At some institutions, catheter angiography is used for confirmation of aortic injuries and equivocal MDCT findings. Because of the speed and efficiency of 64-MDCT, we believe that diagnostic catheter angiography may be obsolete. The purpose of this study was to review our experience with 64-MDCT in the evaluation of acute traumatic aortic injury ( […]

[Chest Imaging] Chest Radiographic and CT Manifestations of Chronic Granulomatous Disease in Adults

OBJECTIVE. The purpose of this study was to describe the thoracic radiologic findings of chronic granulomatous disease in adults. MATERIALS AND METHODS. We retrospectively analyzed the chest radiographic and CT findings in four adults with chronic granulomatous disease during five episodes of lower respiratory tract infection. RESULTS. Chest radiographic fin […]

[Chest Imaging] MDCT Detection of Airway Stent Complications: Comparison with Bronchoscopy

OBJECTIVE. The objective of our study was to evaluate the detection rate of central airway stent complications using MDCT as compared with bronchoscopy. MATERIALS AND METHODS. A review was performed of all consecutive patients undergoing MDCT and bronchoscopy for suspected complications of airway stents during an 18-month period. MDCT images were interpreted […]

[Chest Imaging] Time-Resolved MR Angiography of the Central Veins of the Chest

OBJECTIVE. The purpose of our study was to show the usefulness and limitations of contrast-enhanced time-resolved MR angiography (MRA) for imaging the central veins of the chest. CONCLUSION. Time-resolved MRA is highly sensitive for the detection of abnormalities and is particularly useful in conjunction with static high-spatial-resolution MRA. However, seve […]

[Chest Imaging] Accuracy of High-Resolution CT in the Diagnosis of Diffuse Lung Disease: Effect of Predominance and Distribution of Findings

OBJECTIVE. The purpose of this study was to determine whether the predominant findings at high-resolution CT influence the accuracy of diagnosis of diffuse lung disease. MATERIALS AND METHODS. The cases of 100 patients with diffuse lung disease who underwent high-resolution CT and tissue diagnosis were studied. Three thoracic radiologists reviewed high-resol […]

[Chest Imaging] Progression from Near-Normal to End-Stage Lungs in Chronic Interstitial Pneumonia Related to Silica Exposure: Long-Term CT Observations

OBJECTIVE. The objective of our study was to evaluate serial CT changes from normal or near-normal lungs to honeycomb lungs in dust-exposed patients who developed chronic interstitial pneumonia. MATERIALS AND METHODS. From the records of the national hospital for pneumoconiosis, we retrospectively identified patients with chronic interstitial pneumonia who w […]

[Chest Imaging] MDCT Evaluation of Central Airway and Vascular Complications of Lung Transplantation

OBJECTIVE. The purpose of this article is to illustrate the spectrum of central airway and vascular complications in lung transplantation using MDCT, with an emphasis on the usefulness of advanced postprocessing techniques. CONCLUSION. MDCT is an invaluable tool in the diagnosis, evaluation, and posttreatment assessment of central airway and vascular complic […]

[Chest Imaging] Pulmonary Nodules: Detection, Assessment, and CAD

OBJECTIVE. The imaging of pulmonary nodules is an evolving and dynamic field. In this review, we discuss the detection and multitechnique characterization of pulmonary nodules, emphasizing the impact of technological advances on both noninvasive and invasive evaluation and surveillance. The potential contribution of MRI, evolving imaging-guided techniques, a […]

[Chest Imaging] High-Resolution CT Findings of Mycobacterium avium-intracellulare Complex Pulmonary Disease: Correlation with Pulmonary Function Test Results

[Chest Imaging] Use of 3D Adaptive Raw-Data Filter in CT of the Lung: Effect on Radiation Dose Reduction

OBJECTIVE. The purpose of this study was to determine the effectiveness of a 3D adaptive raw-data filter in improving image quality and the role of the filter in radiation dose reduction in lung CT. MATERIALS AND METHODS. Fifty-eight chest CT examinations were performed with a 16-MDCT scanner. Two acquisitions were performed with different tube current […]

American Journal of Roentgenology Neuroradiology

[Neuroradiology] Optimization of Perfusion Imaging for Acute Cerebral Ischemia: Review of Recent Clinical Trials and Recommendations for Future Studies

OBJECTIVE. The use of thrombolytic agents and other forms of reperfusion therapy has provided a means to reverse ischemia and minimize the size of infarctions. The purpose of this review is to examine various clinical trials of reperfusion agents and address key imaging issues. CONCLUSION. Advanced MRI and CT play a growing role in selection of patients for […]

RadioGraphics: Most-Cited Full-Text Articles

Minimally Invasive Treatment of Malignant Hepatic Tumors: At the Threshold of a Major Breakthrough

Gerald D. Dodd III, Michael C. Soulen, Robert A. Kane, Tito Livraghi, William R. Lees, Yasuyuki Yamashita, Alison R. Gillams, Okkes I. Karahan, Hyunchul RhimJan 1, 2000; 20:9-27Imaging and Therapeutic Technology

Pitfalls in Oncologic Diagnosis with FDG PET Imaging: Physiologic and Benign Variants

Paul D. Shreve, Yoshimi Anzai, Richard L. WahlJan 1, 1999; 19:61-77Scientific Exhibits

AAPM/RSNA Physics Tutorial for Residents: Topics in CT: Radiation Dose in CT

Michael F. McNitt-GrayNov 1, 2002; 22:1541-1553Imaging and Therapeutic Technology

CT Dose Reduction and Dose Management Tools: Overview of Available Options

Cynthia H. McCollough, Michael R. Bruesewitz, James M. Kofler JrMar 1, 2006; 26:503-512RSNA Education Exhibits

Three-dimensional Volume Rendering of Spiral CT Data: Theory and Method

Paul S. Calhoun, Brian S. Kuszyk, David G. Heath, Jennifer C. Carley, Elliot K. FishmanMay 1, 1999; 19:745-764infoRAD

Multisection CT: Scanning Techniques and Clinical Applications

Jonas Rydberg, Kenneth A. Buckwalter, Karen S. Caldemeyer, Michael D. Phillips, Dewey J. Conces Jr, Alex M. Aisen, Scott A. Persohn, Kenyon K. KopeckyNov 1, 2000; 20:1787-1806Imaging and Therapeutic Technology

Percutaneous vertebroplasty: state of the art

A Cotten, N Boutry, B Cortet, R Assaker, X Demondion, D Leblond, P Chastanet, B Duquesnoy, H DeramondMar 1, 1998; 18:311-320Reviews

Radiation-induced skin injuries from fluoroscopy

TB ShopeSep 1, 1996; 16:1195-1199Articles

Carotid duplex sonography: a multicenter recommendation for standardized imaging and Doppler criteria

EI Bluth, AT Stavros, KW Marich, SM Wetzner, D Aufrichtig, JD BakerMay 1, 1988; 8:487-506Articles

Major Complications after Radio-frequency Thermal Ablation of Hepatic Tumors: Spectrum of Imaging Findings

Hyunchul Rhim, Kwon-Ha Yoon, Jeong Min Lee, Yoonkoo Cho, June-Sik Cho, Seung Hoon Kim, Won-Jae Lee, Hyo Keun Lim, Gyoung-Jin Nam, Sang-Suk Han, Yun Hwan Kim, Cheol Min Park, Pyo Nyun Kim, Jae-Young ByunJan 1, 2003; 23:123-134RSNA Education Exhibits

AJR Am J Roentgenol: Most-Cited Full-Text Articles

Iterative Reconstruction Technique for Reducing Body Radiation Dose at CT: Feasibility Study

Amy K. Hara, Robert G. Paden, Alvin C. Silva, Jennifer L. Kujak, Holly J. Lawder, William PavlicekSep 1, 2009; 193:764-771Gastrointestinal Imaging

Radiation Exposure to Patients During Interventional Procedures in 20 Countries: Initial IAEA Project Results

Virginia Tsapaki, Nada A. Ahmed, Jamila Salem AlSuwaidi, Adnan Beganovic, Abdelkader Benider, Latifa BenOmrane, Rada Borisova, Sotirios Economides, Leila El-Nachef, Dario Faj, Ashot Hovhannesyan, Mohammad Hassan Kharita, Nadia Khelassi-Toutaoui, Nisakorn Manatrakul, Ilkhom Mirsaidov, Mohamed Shaaban, Ion Ursulean, Jeska Sidika Wambani, Areesha Zaman, Julius […]

MRI Safety Update 2008: Part 1, MRI Contrast Agents and Nephrogenic Systemic Fibrosis

Frank G. Shellock, Alberto SpinazziOct 1, 2008; 191:1129-1139MR Imaging

Innovations in CT Dose Reduction Strategy: Application of the Adaptive Statistical Iterative Reconstruction Algorithm

Alvin C. Silva, Holly J. Lawder, Amy Hara, Jennifer Kujak, William PavlicekJan 1, 2010; 194:191-199Medical Physics and Informatics

Prospective Comparison of State-of-the-Art MR Enterography and CT Enterography in Small-Bowel Crohn's Disease

Hassan A. Siddiki, Jeff L. Fidler, Joel G. Fletcher, Sharon S. Burton, James E. Huprich, David M. Hough, C. Daniel Johnson, David H. Bruining, Edward V. Loftus Jr., William J. Sandborn, Darrell S. Pardi, Jayawant N. MandrekarJul 1, 2009; 193:113-121Gastrointestinal Imaging

Dual-Energy and Low-kVp CT in the Abdomen

Benjamin M. Yeh, John A. Shepherd, Zhen J. Wang, Hui Seong Teh, Robert P. Hartman, Sven PrevrhalJul 1, 2009; 193:47-54Gastrointestinal Imaging

Estimating Effective Dose for CT Using Dose-Length Product Compared With Using Organ Doses: Consequences of Adopting International Commission on Radiological Protection Publication 103 or Dual-Energy Scanning

Jodie A. Christner, James M. Kofler, Cynthia H. McColloughApr 1, 2010; 194:881-889Medical Physics and Informatics

Cumulative Radiation Exposure and Cancer Risk Estimates in Emergency Department Patients Undergoing Repeat or Multiple CT

Richard T. Griffey, Aaron SodicksonApr 1, 2009; 192:887-892Health Care Policy and Quality

Swine-Origin Influenza A (H1N1) Viral Infection: Radiographic and CT Findings

Amr M. Ajlan, Brendan Quiney, Savvas Nicolaou, Nestor L. MullerDec 1, 2009; 193:1494-1499Cardiopulmonary Imaging

In Defense of Body CT

Cynthia H. McCollough, Luis Guimaraes, Joel G. FletcherJul 1, 2009; 193:28-39Gastrointestinal Imaging

American Journal of Roentgenology Musculoskeletal Imaging

MRI Appearance of the Proximal Hamstring Tendons in Patients With and Without Symptomatic Proximal Hamstring Tendinopathy

OBJECTIVE. The purpose of our study was to determine if six MRI findings of the proximal hamstrings differ in frequency in hamstrings with and without symptoms of tendinopathy. MATERIALS AND METHODS. We reviewed the MRI examinations of 118 consecutive patients who had undergone pelvis MRI and evaluation by a musculoskeletal clinical specialist. The proximal […]

Assessment of Volar Radiocarpal Ligaments: MR Arthrographic and Arthroscopic Correlation

OBJECTIVE. The purpose of this study, with wrist arthroscopy as the reference standard, was to assess the usefulness of MRI in the detection of tears of the radioscaphocapitate and long radiolunate extrinsic carpal ligaments. MATERIALS AND METHODS. The cases of 26 patients consecutively registered from 2003 to 2009 who underwent wrist arthroscopy and wrist M […]

Usefulness of Dynamic Contrast-Enhanced MRI in Differentiating Between Septic Arthritis and Transient Synovitis in the Hip Joint

OBJECTIVE. The purpose of this study was to show the usefulness of dynamic contrast-enhanced MRI (DCE-MRI) and to determine the optimal time window in MRI for differentiating between septic arthritis and transient synovitis in painful hip joints. MATERIALS AND METHODS. Eighteen patients who underwent DCE-MRI were enrolled, and the final diagnoses were septic […]

Chronologic Change in the Growth Plate After Radiofrequency-Induced Thermal Injury: MRI-Histologic Correlation

Meniscal Tear Configurations: Categorization With 3D Isotropic Turbo Spin-Echo MRI Compared With Conventional MRI at 3 T

Correlation Between the Severity of Carpal Tunnel Syndrome and Color Doppler Sonography Findings

Proton MR Spectroscopy in Metabolic Assessment of Musculoskeletal Lesions

OBJECTIVE. The purposes of this review are to describe the principles and method of MR spectroscopy, summarize current published data on musculoskeletal lesions, and report additional cases that have been analyzed with recently developed quantitative methods. CONCLUSION. Proton MR spectroscopy can be used to identify key tissue metabolites and may serve as a […]

Correlation of MR Arthrographic Findings and Range of Shoulder Motions in Patients With Frozen Shoulder

Evaluation of the Diagnostic Performance of Tomosynthesis in Fractures of the Wrist

OBJECTIVE. The purpose of our study was to define the diagnostic value of tomosynthesis compared with standard radiography and CT in wrist injuries. MATERIALS AND METHODS. One hundred consecutive patients with acute wrist trauma were investigated with standard radiography, tomosynthesis, and CT. Reference results were those obtained with CT; follow-up monito […]

Ultrasound of the Rotator Cable: Prevalence and Morphology in Asymptomatic Shoulders

OBJECTIVE. The objective of our study was to assess the prevalence, morphology, and position of the rotator cable and the relation of this structure to the rotator cuff crescent. MATERIALS AND METHODS. Ultrasound examinations of bilateral shoulders of asymptomatic volunteers and of the asymptomatic shoulder in patients referred for assessment of a symptomati […]