UNLABELLED The rat infarct model is widely used to study left ventricular (LV) remodeling, a main cause of heart failure characterized by progressive LV dilatation. Using pinhole collimators and advances in data processing, gated SPECT was recently adapted to image the rat heart. The aim of this study was to assess this new imaging technique for predicting and quantifying variable LV remodeling...

BACKGROUND Although magnetic resonance first-pass imaging (MRFP) has potential advantages in pharmacological stress perfusion imaging, direct comparisons of current MRFP and established radionuclide techniques are not available. METHODS AND RESULTS Graded regional differences in coronary flow were produced during global coronary vasodilation in chronically instrumented dogs by partially occlu...

The management of primary hyperparathyroidism is not without controversy. There is controversy as to which imaging technique (if any) should be used to localize a parathyroid adenoma (1,2). There is controversy as to when surgery should be recommended in an asymptomatic patient; although some would argue that all patients are symptomatic but simply do not realize it! There is also controversy a...

INTRODUCTION We aimed to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement. MATERIALS AND METHO...

UNLABELLED Parathyroid cystic adenomas are often misdiagnosed as thyroid cysts and routine preoperative diagnostic tools, such as ultrasonography (US) or 99m technetium-sestamibi (99mTc-MIBI) scans, cannot clearly distinguish between these entities. We present a 67-year-old hypercalcemic woman with a cervical cystic lesion who had negative sestamibi scan results. Her laboratory data indicated p...

The blood-brain barrier and a blood-cerebrospinal-fluid (CSF) barrier function together to isolate the brain from circulating drugs, toxins, and xenobiotics. The blood-CSF drug-permeability barrier is localized to the epithelium of the choroid plexus (CP). However, the molecular mechanisms regulating drug permeability across the CP epithelium are defined poorly. Herein, we describe a drug-perme...

BACKGROUND AND AIMS Sincalide, in conjunction with cholescintigraphy, is necessary for the diagnosis of chronic acalculous cholecystitis. However sincalide is not widely available. This study investigates the use of a commercially available formula as an inexpensive alternative to sincalide, containing a sufficient and known amount of fat to cause gallbladder contraction, and to determine norma...