PIOPED Study. Part I. Data Collection and Tabulation Page 1 The criteria used for categorical
interpretationof the ventilation-perfusion (V/Q) scans in the PIOPED study were developed …

METhODS AND RESULTS In the analysesthatfollow, we discusseach criterionused in the
PIOPED study for categorical probabilityassessment. The datareportedherewereobtainedbyisolatingv …

One of the main problems encountered in the analysis of ventilation/perfusion (V/P) lung
scans for the diagnosis of pulmonary embolism (PE) is difficulty in assessing the size of the …

METHODS The study group is composed of 42 patients. Each of 33 successive patients with
a defect in the per fusion scintigram had a ventilation study performed within 24 hr. In …

Ventilation‐perfusion scintigraphy is an established procedure for the investigation of lung
disease. Perfusion scans are commonly obtained with ay‐camera following injection of …

Defects observed in pulmonary perfusion scintiphotography often have been equated with a
diagnosis of pulmonary embolism. In fact, such defects have lacked diagnostic specificity …

The major clinical use of ventilation-perfusion (V/Q) scintigraphy is for the diagnosis of
pulmonary embolism (PE). Accurate diagnosis of PE is essential since effective treatment is …

Ventilation perfusion imaging using single photon emission tomography was carried out in
the supine position on four subjects, three normal volunteers and one patient, all free from …

METHOD The ventilation-perfusionlung scintigram. An intra venous injection of 2 mCi of Tc-
99m-labeled macroaggregated albumin was given with the subject supine and breathing …

METHODS Patients are studied in the supine position. Data are accumulated with a Picker
Dynapix, a 10-crystal rectilinear scanner (8). The counts from each radia tion detector are …