Abstract: The aim of this study was to develop a cheap, locally made and friendly applicable phantom for gamma camera quality control and to test its validity relative to standard results (intrinsic and extrinsic spat...Abstract: The aim of this study was to develop a cheap, locally made and friendly applicable phantom for gamma camera quality control and to test its validity relative to standard results (intrinsic and extrinsic spatial linearity and intrinsic and extrinsic uniformity) of gamma camera SPECT. And the significance of this experimental study was to introduce a multi-purpose phantom for gamma camera which could overcome the risk accompanied by quality control test procedure such as detector crystal damage and the appearance of moiré patterns. The results of the developed phantom showed an average count difference of 0.7% relative to the standard phantom and about 4% in X- to Y-axis directions relative to the standard phantom. Also, the measured absolute linearity was 0.63 mm in X direction and 0.64 mm in Y direction for the UFOV compare with 0.70 mm value of acceptance test. And the I.U. and D.U. of the developed phantom were 3.18% and 2.27% respectively for the UFOV relative to the standard phantom I.U. and D.U. (2.0% and 1.5%) for the UFOV respectively.展开更多
A total sample size consisting of 150 Diabetic male patients has been investigated by ultrasound system General Electric using gray-scale B-mode imaging with curvilinear transducer 3 MHz to assess the impact of diabet...A total sample size consisting of 150 Diabetic male patients has been investigated by ultrasound system General Electric using gray-scale B-mode imaging with curvilinear transducer 3 MHz to assess the impact of diabetes in kidney morphology and it is distributed in Sudan. The collected data were the patient age, height, weight, kidneys size, ultrasound findings of involved kidneys, and duration of diabetes and residence region. The analyzed data show that the diabetes has been as endemic disease in central Sudan (Khartoum & Jazeera) representing 55% and in the west of Sudan representing 38%. The BMI of diabetic patients has been significantly (R2 = 0.6) decreasing following aging. The kidney size increases significantly as R2 = 0.75 and 0.6 for left and right kidney respectively. Their correlation is fitted in the following equations: y = 3.95x + 27.26 and y = 2.41x + 35.12 for the left and right kidney respectively. The impact of duration was a reduction in size significantly as R2 = 0.61 and 0.55 with a correlation fitted in the following equations: y = –2.22x + 139.9 and y = –1.51x + 96.59 for the left and right kidney respectively. The mean kidney length was (14.5 cm) and the renal cortex in the range of 2 - 2.3 cm, the kidneys size were so enlarged as 92.4 ± 11.7 and 121 ± 17.1 for the right and left kidney respectively while in late case of Diabetes, the kidney is more echogenic, atrophied size with loss of corticomedullary differentiation.展开更多
文摘Abstract: The aim of this study was to develop a cheap, locally made and friendly applicable phantom for gamma camera quality control and to test its validity relative to standard results (intrinsic and extrinsic spatial linearity and intrinsic and extrinsic uniformity) of gamma camera SPECT. And the significance of this experimental study was to introduce a multi-purpose phantom for gamma camera which could overcome the risk accompanied by quality control test procedure such as detector crystal damage and the appearance of moiré patterns. The results of the developed phantom showed an average count difference of 0.7% relative to the standard phantom and about 4% in X- to Y-axis directions relative to the standard phantom. Also, the measured absolute linearity was 0.63 mm in X direction and 0.64 mm in Y direction for the UFOV compare with 0.70 mm value of acceptance test. And the I.U. and D.U. of the developed phantom were 3.18% and 2.27% respectively for the UFOV relative to the standard phantom I.U. and D.U. (2.0% and 1.5%) for the UFOV respectively.
文摘A total sample size consisting of 150 Diabetic male patients has been investigated by ultrasound system General Electric using gray-scale B-mode imaging with curvilinear transducer 3 MHz to assess the impact of diabetes in kidney morphology and it is distributed in Sudan. The collected data were the patient age, height, weight, kidneys size, ultrasound findings of involved kidneys, and duration of diabetes and residence region. The analyzed data show that the diabetes has been as endemic disease in central Sudan (Khartoum & Jazeera) representing 55% and in the west of Sudan representing 38%. The BMI of diabetic patients has been significantly (R2 = 0.6) decreasing following aging. The kidney size increases significantly as R2 = 0.75 and 0.6 for left and right kidney respectively. Their correlation is fitted in the following equations: y = 3.95x + 27.26 and y = 2.41x + 35.12 for the left and right kidney respectively. The impact of duration was a reduction in size significantly as R2 = 0.61 and 0.55 with a correlation fitted in the following equations: y = –2.22x + 139.9 and y = –1.51x + 96.59 for the left and right kidney respectively. The mean kidney length was (14.5 cm) and the renal cortex in the range of 2 - 2.3 cm, the kidneys size were so enlarged as 92.4 ± 11.7 and 121 ± 17.1 for the right and left kidney respectively while in late case of Diabetes, the kidney is more echogenic, atrophied size with loss of corticomedullary differentiation.
