Idiopathic nasal bone osteitis: A preliminary report on a recently recognized entity.

Osteitis of the nasal bones is a rare disease; when it occurs, it usually has a known etiology. To the best of our knowledge, idiopathic nasal bone osteitis (NBO) has not been described before. We conducted a study to analyze the behavior of idiopathic NBO and its outcome and to determine a cutoff level for diagnosis using technetium-99m-methylene-diphosphonate (Tc-MDP) bone scanning.

The predictive value of ventilation-perfusion scanning for the diagnosis of pulmonary embolism in patients with impaired renal function.

Background: Computed tomography pulmonary angiography (CTPA) is considered the method of choice for diagnosing pulmonary embolism (PE). In most patients with impaired renal function, ventilation-perfusion (V/Q) scanning is the preferred modality.

Objectives: To evaluate the predictive value of V/Q scanning in patients with impaired renal function.

The "bladder sign"--an important early marker of retroperitoneal hemorrhage.

Retroperitoneal hemorrhage remains one of the major complications of cardiac and peripheral vascular catheterization. Its high associated morbidity and mortality require vigilance and early intervention. We report six cases of retroperitoneal hemorrhage featuring a "bladder sign.

Combined assessment of coronary anatomy and myocardial perfusion using multidetector computed tomography for the evaluation of coronary artery disease.

Multidetector computed tomography (MDCT) is increasingly used as an alternative to invasive coronary angiography. Although computed tomographic coronary angiography (CTCA) has been validated against invasive coronary angiography and nuclear myocardial perfusion imaging, the potential of MDCT to evaluate perfusion has not been fully explored. We sought to (1) develop a new technique for quantitative assessment of myocardial enhancement based on analysis of MDCT images acquired for CTCA, (2) identify the underlying causes of myocardial hypoenhancement detected by MDCT, and (3) determine the added diagnostic value of the MDCT perfusion index when combined with CTCA.

Value of multidetector computed tomography evaluation of myocardial perfusion in the assessment of ischemic heart disease: comparison with nuclear perfusion imaging.

MDCT-derived myocardial perfusion has not yet been validated against accepted standards. We developed a technique for quantification of myocardial perfusion from MDCT images and studied its diagnostic value against SPECT myocardial perfusion imaging (MPI). Ninety-eight patients were studied.