RADIONUCLIDE PERFUSION AND VENTILATION (V/Q) LUNG SCAN

DATE: 10/4/2005

PROCEDURE:  Following IV administration of 99mTc-macroaggregates of albumin, perfusion images of the lung were obtained in the anterior, posterior, bilateral oblique, and both lateral projections.  Ventilation images were acquired in the same projections after deposition of 99mTc-DTPA aerosol in the airway.

99mTc-MAA DOSE: [1.5] mCi

99mTc-DTPA DOSE: [6] mCi

CORRELATIVE STUDIES: Chest X-ray dated […].

COMPARISON: None.

CLINICAL HISTORY: The patient is a [...]-year-old [fe]male [...], now presenting with worsening dyspnea. The patient is now referred for evaluation of a possible acute pulmonary embolism.

FINDINGS: 

Perfusion study: 

There is diffuse homogeneous uptake visualized on the perfusion images.  No segmental defects are seen. 

On the […] images, a significant decrease in tracer activity is noted throughout the […]. No other defects in perfusion are noted.

Ventilation study:  

There is diffuse homogeneous uptake visualized on the ventilation images.  No segmental defects are seen. 

When compared to the perfusion study, the defect in tracer uptake in the […] are completely matched. No other defects in ventilation are observed.

CONCLUSIONS:

No segmental defects. Under PIOPED criteria, this is a normal study.

A matched ventilation perfusion defect is noted in […], likely secondary to […]. Under PIOPED criteria, this study is consistent with a low probability for an acute pulmonary embolism.

Thank you for referring this patient to the UCLA Nuclear Medicine Clinic.

I, [...], M.D., Ph.D., have reviewed this Nuclear Medicine study personally, and am in full agreement with the findings of the report presented here.