Investigative Radiology publishes original, peer-reviewed reports on clinicaland laboratory investigations in diagnostic imaging, the diagnostic useof radioactive isotopes, computed tomography, positron emission tomography,magnetic resonance imaging, ultrasound, digital subtraction angiography,and related modalities. Emphasis is on early and timely publication. Primarilyresearch-oriented, the journal also includes a wide variety of featuresof interest to clinical radiologists.