Anatomical knowledge retention in Obstetrics and Gynaecology residents and impact of an e-learning tool.

Purpose: Anatomical knowledge of medical students and residents is insufficient and further anatomical sciences throughout medical curriculum may be necessary. The first aim of this study was to assess pelvic and perineal anatomical knowledge retention of Obstetrics and Gynaecology (Ob/Gyn) residents. The second was to assess the impact of an e-learning tool on anatomical knowledge.

Diagnostic performance of quantitative coronary computed tomography angiography and quantitative coronary angiography to predict hemodynamic significance of intermediate-grade stenoses.

Fractional flow reserve (FFR) during invasive coronary angiography has become an established tool for guiding treatment. However, only one-third of intermediate-grade coronary artery stenosis (ICAS) are hemodynamically significant and require coronary revascularization. Additionally, the severity of stenosis visually established by coronary computed tomography angiography (CCTA) does not reliably correlate with the functional severity.

Undiagnosed breast cancer at MR imaging: analysis of causes.

Purpose: To retrospectively review the causes of false-negative results on prior magnetic resonance (MR) imaging studies in patients who developed breast cancer as revealed on a follow-up MR imaging study and to determine the presumptive causes of these false-negative findings.

Materials And Methods: Fifty-eight pairs of MR imaging studies from one institution were assessed, consisting of a prior study without a diagnosis of cancer and a diagnostic study with subsequent findings of 60 cancers in 58 women at MR imaging (mean interval between prior and diagnostic MR examinations, 13.8 months).

Mid-term clinical and angiographic results of cerebral aneurisms treated with matrix2(®) coils.

Objective: To evaluate 1 year results of endovascular treatment (EVT) of intracranial aneurisms using Matrix second generation detachable coils (MSG(®)).

Patients And Methods: Between January and December 2006, 32 patients with 32 intracranial aneurisms were treated by coiling using MSG(®), with a minimum follow-up of 1 year. Data were acquired prospectively.

Characterization of small solid renal lesions: can benign and malignant tumors be differentiated with CT?

Objective: The purpose of this study was to evaluate the diagnostic performance of CT in determining whether a small solid renal enhancing mass is benign or malignant.

Materials And Methods: Ninety-nine biopsies of enhancing solid renal masses 4 cm or smaller without fat on CT scans were performed under CT fluoroscopic guidance. The growth pattern, interface with parenchyma, presence of a scar and segmental inversion enhancement, unenhanced CT histogram, and pattern and degree of enhancement on triphasic MDCT images were independently evaluated by two radiologists.

Growth of breast cancer recurrences assessed by consecutive MRI.

Background: Women with a personal history of breast cancer have a high risk of developing an ipsi- or contralateral recurrence. We aimed to compare the growth rate of primary breast cancer and recurrences in women who had undergone prior breast magnetic resonance imaging (MRI).

Methods: Three hundred and sixty-two women were diagnosed with breast cancer and had undergone breast MRI at the time of diagnosis in our institution (2005 - 2009).

Rheumatoid arthritis of the hand: monitoring with a simplified MR imaging scoring method--preliminary assessment.

Purpose: To assess a simplified scoring method (Simplified Rheumatoid Arthritis Magnetic Resonance Imaging Score [SAMIS]) developed to shorten interpretation time, while retaining both correlation with Rheumatoid Arthritis Magnetic Resonance Imaging Score (RAMRIS) and same or better intra- and interreader reliability.

Materials And Methods: Ethics board approval and written patient consent were obtained. The study was HIPAA compliant.

Endovascular treatment of 174 middle cerebral artery aneurysms: clinical outcome and radiologic results at long-term follow-up.

Purpose: To retrospectively evaluate the immediate safety and efficacy as well as the clinical outcome and long-term angiographic results of endovascular treatment (EVT) of middle cerebral artery (MCA) aneurysms.

Materials And Methods: This is a retrospective review of patients in whom coiling of MCA aneurysms was attempted over a 7-year period. Institutional review board approval and informed written consent were obtained.

Value of computed tomography in the diagnosis of the cause of nontraumatic gastrointestinal tract perforation.

Objective: To identify computed tomographic features with a high predictive value to differentiate gastroduodenal ulcer perforations from other causes of perforations in patients with a non-traumatic-free pneumoperitoneum.

Materials And Methods: Computed tomographic scans of 81 patients with a non-traumatic-free pneumoperitoneum were reviewed for direct visualization of the perforation site and indirect findings of the perforation, including the presence, amount, and localization of air and ascites in the peritoneal cavity, mural thickness of the gastrointestinal tract, perigastrointestinal fat stranding, intestinal ischemia, fecal peritonitis, abscess, and portomesenteric venous gas.

Results: The perforation site was directly visualized in 16 (41%) of 39 patients with gastroduodenal ulcer perforation and in 5 (12%) of 42 patients with other causes of perforation.

Direct visualization of perforation sites in patients with a non-traumatic free pneumoperitoneum: added diagnostic value of thin transverse slices and coronal and sagittal reformations for multi-detector CT.

The incremental diagnostic value of adding 1.25-mm slices and coronal and sagittal reformatting to 5-mm axial reconstructions for direct visualization of the perforation site in patients with non-traumatic free pneumoperitoneum was assessed. Forty patients with non-traumatic bowel perforation and free pneumoperitoneum underwent computed tomography (CT).

Creating an interactive Web-based e-learning course: a practical introduction for radiologists.

With the development of e-learning and its ability to provide rich animated content rapidly to a wide audience, new methods for teaching medical imaging have evolved. E-learning tools allow building of learner-focused structured courses. Standards such as shareable content object reference model (SCORM) or Aviation Industry Computer-based Training Committee (AICC) guidelines and recommendations provide the framework required to combine text, images, videos, animations, and quizzes for learning assessment, even if each of these elements is created with different software.