Canadian Association of Radiologists Journal

A study was performed to evaluate the ACR Select software in determining the level of appropriateness of computed tomography (CT) and magnetic resonance imaging (MRI) in Island Health in British Columbia.

A total of 1228 consecutive CT and MRI studies performed in a 3-day period were entered into a software program provided by the National Decision Support Company based on the ACR Appropriateness Criteria. The program was able to analyze 93% (1141) of these studies. A subset of these requisitions was manually reviewed.

The software program demonstrated a very low 2.5% inappropriate rate and manual review showed an even lower number of 0.6%. In a sample of studies deemed to be appropriate by the software, manual review agreed with this ranking in all cases. In addition, in 20% of cases where CT was done, the software program suggested that MRI would be a more appropriate choice.

First, the ACR Select software is a useful tool to assess appropriateness of CT and MRI, although it may underestimate the level of appropriateness of studies labeled as inappropriate. Second, CT and MRI are being ordered appropriately in Island Health in British Columbia. The software recommendation of MRI as more appropriate in 20% of cases where CT was done suggests a lack of MRI resources in Island Health.

Traditionally, indications for imaging studies of women are considered to be related to screening for and evaluation of disease of the female breast and pelvis. However, a number of chest diseases and associated intrathoracic imaging findings are unique to women and should be recognized by general radiologists, as well as chest and women-imaging specialists.

The sex-specific findings unique to women include normal anatomical variants, primary lung disease, complications of breast and gynaecological disease, and pregnancy-related conditions. Classification, description, and illustration of gender-specific chest imaging findings are the objective of this article.

To evaluate the value of cardiac magnetic resonance imaging (MRI)–based measurements of inferior vena cava (IVC) cross-sectional area in the diagnosis of pericardial constriction.

Patients who had undergone cardiac MRI for evaluation of clinically suspected pericardial constriction were identified retrospectively. The diagnosis of pericardial constriction was established by clinical history, echocardiography, cardiac catheterization, intraoperative findings, and/or histopathology. Cross-sectional areas of the suprahepatic IVC and descending aorta were measured on a single axial steady-state free-precession (SSFP) image at the level of the esophageal hiatus in end-systole. Logistic regression and receiver-operating curve (ROC) analyses were performed.

Thirty-six patients were included; 50% (n = 18) had pericardial constriction. Mean age was 53.9 ± 15.3 years, and 72% (n = 26) were male. IVC area, ratio of IVC to aortic area, pericardial thickness, and presence of respirophasic septal shift were all significantly different between patients with constriction and those without (P < .001 for all). IVC to aortic area ratio had the highest odds ratio for the prediction of constriction (1070, 95% confidence interval [8.0-143051], P = .005). ROC analysis illustrated that IVC to aortic area ratio discriminated between those with and without constriction with an area under the curve of 0.96 (95% confidence interval [0.91-1.00]).

In patients referred for cardiac MRI assessment of suspected pericardial constriction, measurement of suprahepatic IVC cross-sectional area may be useful in confirming the diagnosis of constriction when used in combination with other imaging findings, including pericardial thickness and respirophasic septal shift.

Our goal is to pictorially review a wide spectrum of congenital and acquired conditions affecting the medial aspect of the temporal lobe.

After completing this article, the reader will have knowledge of the imaging appearance of diverse developmental, malformative, and acquired lesions of the mesial temporal lobe, which will be useful when evaluating pathology in this location.

The prevalence of the celiac artery stenosis caused by median arcuate ligament (MAL) compression and its multidetector computed tomography (MDCT) characteristics were evaluated in patients who underwent abdominal MDCT procedures, retrospectively.

Totally 1121 patients who had abdominal MDCT with arterial phase or MDCT angiography of the abdominal aorta for various indications were analyzed for celiac artery compression by the MAL.

Fifty (ie, 4.6%) patients showed typical MDCT features of MAL compression. Focal narrowing of the proximal celiac artery, a characteristic hooked appearance of the narrowed segment without calcification and atherosclerotic changes were diagnostic. Poststenotic dilatation was detected in 22 (44%) patients with MAL compression. The ratio of the stenosis of the celiac artery was between 35%-50% in 15 patients and 51%-80% in 35 patients. The gastroduodenal artery diameter of these patients was not significantly different from the asymptomatic control group.

MALS is an uncommon entity but it should be kept in mind in the presence of unexplained gastrointestinal symptoms. MDCT is a minimally invasive and plays a dominant role in the diagnosis of MAL compression especially with reformatted and 3-D reconstructed images.

According to a national survey of over 900 Canadian medical students, the stereotype of an isolated radiologist working in a dark room persists. The purpose of this study is to use qualitative methods to explore the ways exposure to radiology in medical school impacts students’ opinions and perceptions of radiology and radiologists.

After receiving ethics approval, 4 focus groups were conducted, 1 per year of undergraduate medical training at Western University. The transcribed audio recordings and accompanying field notes, together with the open-ended questions obtained from the national survey, were analyzed using thematic analysis.

Five hundred sixty students in medical school years 1 and 2 (preclerkship) participated in the national survey and 18 in the focus groups; 336 students in years 3 and 4 [clerkship] participated in the national survey and 10 in the focus groups. Three major findings emerged from the analysis of the data. First, stereotypes are perpetuated mainly through informal interactions. Second, there is limited exposure to radiology and radiologists in medical school, especially in preclerkship. Third, students want to know what to expect if they choose a career in radiology.

Medical students, especially those in preclerkship, are seeking accurate information to modify or reinforce radiology stereotypes. Limited exposure makes interactions with students impactful and mentorship essential. Students want meaningful interactions with radiologists and radiology residents.