Covert COVID-19: Cone Beam Computed Tomography Lung Changes in an Asymptomatic Patient Receiving Radiation Therapy.

Purpose: COVID-19 profoundly affected the United States, with New York City rapidly becoming the epicenter of the disease. Patients with cancer represent a vulnerable population in this pandemic, with data suggesting a higher risk for severe events and unfavorable outcomes. Timely identification of COVID-19 in patients with cancer has been thwarted by the limited availability of outpatient testing for SARS-CoV-2.

Three unsuspected CT diagnoses of COVID-19.

Purpose: Coronavirus disease 2019 (COVID-19) is caused by a novel strain of coronavirus named severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that has quickly spread around the globe. Health care facilities in the USA currently do not have an adequate supply of COVID-19 tests to meet the growing demand. Imaging findings for COVID-19 are non-specific but include pulmonary parenchymal ground-glass opacities in a predominantly basal and peripheral distribution.

MRI of placenta accreta: a new imaging perspective.

Objective: The goal of this study was to identify new MR criteria and review established MR criteria for the diagnosis of placenta accreta. MR images of all patients presenting to our department for evaluation of placenta accreta over the previous 5 years were reviewed and findings were correlated with surgical pathology.

Conclusion: We found the most sensitive MR criteria for the diagnosis of invasive placentation to be abnormal placental vascularity in addition to the previously described intraplacental T2 dark bands.

Comparison of computed tomography angiography to contrast arteriography for patients undergoing evaluation for lower extremity revascularization.

In an effort to explore alternatives to contrast arteriography, we compared computed tomography angiography to contrast arteriography for defining anatomic features of patients undergoing lower extremity revascularization. From November 2003 to March 2004, 36 inpatients with chronic lower extremity ischemia underwent contrast arteriography and computed tomography angiography before undergoing lower extremity revascularization procedures. A Siemens 16 slice multiplanar computed tomography device with bolus tracking was used for these exams.

Rapid T2-weighted MR imaging of uterine leiomyoma and adenomyosis.

Background: To compare three rapid T2-weighted pulse sequences with high-resolution turbo spin-echo (SE) magnetic resonance (MR) imaging for the diagnosis of leiomyoma and adenomyosis.

Methods: Eighteen patients referred for evaluation of suspected leiomyoma or adenomyosis underwent imaging at 1.5 T with a phased-array multicoil.

Thoracic aorta: comparison of gadolinium-enhanced three-dimensional MR angiography with conventional MR imaging.

Purpose: To evaluate gadolinium-enhanced three-dimensional magnetic resonance (MR) angiography for thoracic aortic disease and to compare this technique with conventional thoracic MR imaging.

Materials And Methods: One hundred eight consecutive patients underwent 122 thoracic MR examinations, including conventional MR imaging followed by enhanced three-dimensional MR angiography. A gradient-echo sequence was used at 1.

Image subtraction in gadolinium-enhanced MR imaging.

Image subtraction in gadolinium-enhanced MR imaging is a broadly applicable postprocessing technique that can be used with any field strength and T1-weighted sequence. This technique is typically a quick and efficient means of obtaining fat suppression that avoids the limitations of incomplete fat saturation due to field inhomogeneity and increased imaging times associated with conventional fat-suppression techniques. In particular, image subtraction may be valuable on lower strength magnetic field systems that lack effective chemical-shift fat-suppression techniques.

MR-guided fine needle aspiration of breast lesions: initial experience.

Objective: Fine needle aspiration (FNA) is a minimally invasive procedure that is used to obtain cytologic specimens of suspicious lesions in the breast. The goal of this study was to evaluate the logistics and limitations of MR-guided FNA using a prototype breast localization coil.

Materials And Methods: MR-guided FNAs were attempted on 18 lesions (detected on mammography and/or palpation) in 16 patients.

Ectopic supernumerary kidney: another cause of a pelvic mass.

Ectopic supernumerary pelvic kidney is a rare cause of a pelvic mass in the adolescent populations. We present a case of an ectopic supernumerary pelvic kidney, found incidentally, on a computed axial tomographic (CT) examination.

Percutaneous transhepatic coil embolization of a ruptured intrahepatic aneurysm in polyarteritis nodosa.

Large visceral aneurysms in polyarteritis nodosa are relatively uncommon. We present a patient with polyarteritis nodosa who ruptured a large intrahepatic aneurysm which was treated by percutaneous transhepatic coil embolization.

Transfusional hemosiderosis in sickle cell anemia: another cause of an echogenic pancreas.

We report four sickle cell anemia patients who have received multiple blood transfusions and have been non-compliant on Desferal chelation therapy. Abdominal ultrasonography demonstrated an echogenic pancreas in all four patients. Magnetic resonance imaging in three patients revealed decreased signal intensity in all sequences in the pancreas and liver.