[The association of age and tracer clearance determined radionuclide cisternography].

We aimed to study tracer kinetics in radioisotope (RI) cisternography. For this purpose, we analyzed the RI images of 36 individuals in whom absence of cerebrospinal fluid (CSF) leakage was confirmed. For the semiquantitative assessment of tracer clearance, the geometric mean of the RI count in the anterior and posterior images was obtained for the entire head as well as for the whole spinal axis.

[A study of operator's hand and finger exposure dose reduction during angiographic procedures].

The number of examinations using interventional radiology (IVR) has increased recently. Because of the more advanced and more complex procedures for IVR, longer treatment time is required. Therefore, it is important to determine exposure doses.

[Estimation of operator dose by dose area product meter].

Because of the more advanced and more complex procedures in interventional radiology (IVR), longer treatment times have become necessary. Therefore, it is important to determine the exposure doses received by operators and patients. Operator doses arising from the use of X-rays are mainly due to scattered radiation.

[Semi-quantiative RI cisternographic patterns in patients with chronic headache: a resemblance to those of intracranial hypotension syndrome].

Semi-quantitative radionuclide cisternography was performed to evaluate CSF leakage for patients with long-lasting headache and/or neck pain or refractory dizziness which appeared to be related to posture as well as patients with spontaneous intracranial hypotension (SIH). Radioactivity in the whole CSF space was counted and was plotted against time. SIH cases showed rapid decrease of radioactivity in the CSF space.

Jugular compression and radionuclide cisternographic patterns in patients with chronic headache.

Objective: We investigated the value of the jugular compression test (JCT) in screening patients with chronic headache attributable to persistent cerebrospinal fluid (CSF) leakage.

Methods: Clinical records of 35 consecutive patients who underwent both 111In-diethylenetriamine pentaacetic acid radioisotope (RI) cisternography and JCT were retrospectively analyzed.

Results: A strong correlation was seen between JCT and RI cisternographic findings.

[Radionuclide cisternography for patients suspected of having intracranial hypotension].

We evaluated radionuclide cisternography for the diagnosis of intracranial hypotension in terms of the rate of appearance of abnormal findings in 23 patients, their correlation with therapy, and the most suitable scanning method and timing for visualization of leakage. During the first hour after injection, dynamic lumbar images or consecutively repeated whole-body images were acquired. Whole body images then were acquired at 1, 5, and 24 hours.

[Consideration of the newly standardized interventional reference point].

The interventional reference point is standardized by the International Electrotechnical Commission (IEC), and is adapted to adult cardiovascular studies. We examined the precision of the indicated incident dose at the interventional reference point. As a fundamental examination, we compared entrance phantom dose and incident dose at the interventional reference point.