jI.Un/LETTER TO THE EDITOR Page 1 % Activity remaining inhead compared withIndication
forResults of24.hr activityPatient cisternogram Resultsof cisternogram …

The radiation dose to the brain from 169Yb-DTPA administered intrathecally has recently
come into question. J. Barbizet, et al (1) have suggested the radiation dose to the brain can …

Chicago Pho/Gamma HP) using a 4,000-hole straight bore collimator. To ascertain
quantitatively the amount of activity present in the head of each patient, a semi-circular …

In order to provide further information on radiation doses to the brain and meninges
following intrathecal injection of 169Yb DTPA, 85 cisterno scans were reviewed here. It was …

METHODS In the majority of cases, the radiopharmaceutical was injected into the lumbar
intrathecal space. Radio nucide images of the brain were routinely performed in the anterior …

MATERIALS AND METHODS Sterile and pyrogen-free 169Yb-DTPA and saline solutions
(3M Co.) were administered to adult dogs weighing 20— 30kg and to immature dogs less …

Equilibrium absorbed dose contributions for radiations emitted by 169Yb have been derived
and utilized in the calculation of doses to the spinal cord and nerve roots from intrathecally …

MATERIALS AND METHODS Sixteen patients, who were referred to the Nuclear Medicine
Department, VA Hospital, Gainesville, Florida, for routine cisternography were studied …

RF Jewkes and K. Jeyasingh, Department of Nuclear Page 1 COMPARISON OF 123-T
HIIPPURAN AND 99mTc: DTPA RF Jewkes and K. Jeyasingh, Department of Nuclear Medicine …

—Dennis Gabor The sensitivity of mammography in detecting breast abnormalities is close
to 90%; the specificity in detecting breast cancer is, conversely, as low as 50%. In current …