We incorporated 2-D PC cine sequences because of the potential pitfalls with cine GRE sequences and because of previous reports of MRI of PVM using PC cine sequences.-‘ We chose to use relatively low velocity ranges, as we wanted to be maximally sensitive to flowing blood; small areas of aliasing secondary to blood flowing faster […]
The MRI detection and localization of PVM also allows preprocedural planning for selective pulmonary angiography, though pulmonary angiography still remains the gold standard for depicting the number of lesions and the vascular supply of those lesions, especially in those patients who will have therapeutic embolization or surgical resection. Moreover, the spatial resolution and anatomic resolution […]
The GRE cine images revealed the lesion to be bright (Fig 3, left). The PC cine sequence did not show flow within the lesion (Fig 3, left); hence, the lesion was interpreted as solid with postobstructive mucus, atelectasis, and/or blood. As this was one of the first cases using the PC cine sequence to evaluate […]
The results of the MRI studies agreed with the findings from the pulmonary arteriograms in all four patients who underwent both studies (Fig 1). The patient with Osler-Weber-Rendu syndrome had a 1-cm nodular region of gray signal in the left upper lobe detected on the spin-echo sequences, but, because of fatigue, refused to have this […]
The PC cine pulse sequence incorporated an effective TR of 44 to 64 ms, ТЕ of 7 to 17 ms, flip angle of 30°, and respiratory compensation. These PC cine sequences provided 16 images per cardiac cycle and were 5 to 10 mm thick in the axial and/or coronal planes. The velocity ranges of the […]
Since July 1987, 11 patients have been referred to our institution with the request to “rule out PVM.” This patient population included six male and five female patients ranging in age from 16 to 83 years. Four of these patients were symptomatic with hypoxemia, dyspnea on exertion, or had an audible bruit. The remaining seven […]
Pulmonary vascular malformations (PVMs) may be A congenital or acquired, singular or multiple, and include arteriovenous malformations (AVMs), arteriovenous fistulas, aneurysms, and varices. The finding of a smooth, noncalcified pulmonary nodule/ mass with feeding and/or draining vessels on a chest radiograph or computed tomographic (CT) scan suggests a PVM. Traditionally, these lesions have been confirmed […]