|
|
 |
| |
|
|
|
Parameters Affecting the Quality of Renal Dynamic Scan in Nuclear Medicine Imaging |
|
|
|
PP: 201-205 |
|
|
|
doi:10.18576/jrna/040309
|
|
|
|
Author(s) |
|
|
|
A. M. Kelany,
|
|
|
|
Abstract |
|
|
| In the present study, thirteen centers with nine different acquisition protocols and six analysis programs were surveyed during the routine calibration for gamma camera. During this survey obtained renogram were varied widely from center to another. The curves generated from dynamic phantom can reflect the calibration status of a gamma camera. On the other hand, the data for different centers revealed that Tmax is the most effective parameter for obtaining a good diagnosis for renal function and confirming the quality of the calibration status. The effect of region of interest on the value of Tmax for 153 renal patients was also studied. By using good calibrated gamma camera, the 99mTc-DTPA dynamic scintigraphy was carry out in the rear view by injection intravenously as a bolus 185MBq. Two regions of interest were defined as background around the whole kidneys in comparison with cortical of kidney. Tmax and T½ were calculated from the time of the topmost counts to the time when renogram curve decreased to its half topmost counts. The recorded variations in T½ and Tmax values were due to variations in body surface area for both genders. Overweight of females suffering from obesity and fatty liver causing pressing on the right kidney which results in a significant increase in T1/2 values comparing with that for males. A guiding protocol is constructed to assure the quality of the obtained renogram which depends mainly on the values of Tmax. So, Tmax is considered as an internal quality factor. |
|
|
|
|
|
|
|
