- Email: [email protected]
2266
Abstracts 2264
2266
The accuracy of sonographic size measurement of tumormimicking phantoms under various scanning conditions Kim KW, Choi BI, Kim H-C, Park SH, Lee JY, Lee JM, Han JK, Park K-S, Asan Medical Center, University of Ulsan College of Medicine, Korea; Seoul National University Hospital, Seoul National University College of Medicine, Korea
A comparative study of endoluminal catheter-based ultrasonography and urography on diagnosis of renal pelvis neoplasm Hu B, Zhu J-A, Wu D-L, Feng L, Chen J, Shanghai Jiaotong University Affiliated Sixth People’s Hospital, China
Objectives: To investigate the accuracy of size measurement of tumormimicking phantoms under various scanning conditions. Methods: Agar-based tumor-mimicking phantoms containing 15 ham pieces (6 ⵑ 30 mm) were scanned with an HDI 5000 unit. Conventional and compound US images were obtained with changing transmitted frequency, target depth, focus depth and lateral off-center distance. Transverse and vertical diameters were measured on DICOM viewer. The percent measurement errors relative to reference data were analyzed to explore if there are significant differences according to the target size, change of the scanning parameters and between conventional and compound US. Results: The percent measurement errors of transverse and vertical diameter were larger, as target size decreased (p ⬍ .01). Both transverse and vertical diameters were significantly overestimated with low transmitted frequency, increase in target depth, and increase in lateral off-center distance (p ⬍ .01, respectively). Also, transverse diameters were significantly overestimated with discrepancy in depth of focus and target (p ⬍ .01). Compound US significantly overestimated transverse diameters than conventional US under various scanning conditions (p ⬍ .05, respectively), except for high transmitted frequency. Compound US significantly overestimated vertical diameters than conventional US with increase in lateral off-center distance (p ⫽ .0194, ⫽ .0156). Conclusions: Transverse and vertical diameters of echogenic lesion can be overestimated on US under various scanning conditions.
P143
Objectives: To study the endoluminal catheter-based ultrasonographic features of renal pelvis neoplasm by comparing with retrograde urography. Methods: Sixty models of neoplasms of renal pelvis in pigs were set up. The unequirotal and difform porcine meat, which were simulated as neoplasms, adhered to the different parts (upper, middle, lower pole; ventral or dorsal wall) of the renal pelvis .The renal pelvis neoplasms in 60 excised kidneys were evaluated by endoluminal catheter-based ultrasonography and retrograde urography, respectively. Results: Significant differences were found in the detectable rate of neoplasm between the ultrasonography and retrograde urography (98.9 % versus 58.6 %, p ⬍ 0.01). No significant differences in the unequirotal and difform neoplasms by ultrasonography (p ⬎ 0.05), but the results were reversed by retrograde urography ( p ⬍ 0.01). Both imaging techniques could evaluate the location of the neoplasm, but retrograde urography could not demonstrate the neoplasm from ventral or dorsal wall of renal pelvis. Endoluminal ultrasonography could display the echo-texture of the neoplasms and measure the its size precisely, but difficult to display lesions less than 1cm by urography. Conclusions: Endoluminal ultrasound has apparent advantages over retrograde urography especially in detecting the small size of renal pelvis neoplasm, which plays an important role in clinical applications.
2267 URETER 2265 A comparative study of endoluminal ultrasonography in the upper urinary tract Zhu JA, Hu B, Feng L, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, China Objectives: To compare the clinic value of endoluminal ultrasonography with IVP on diagnosis of diseases in the upper urinary tract in human. Methods: Thirty patients were examined by using endoluminal sonography and IVP. All the cases were confirmed by pathology or other techniques. Results: The detectable rate of tumor in renal pelvis as examined by ultrasonography was 92%, and was 54% by IVP. The detectable rate of tumor less than 10mm in size as examined by ultrasonography was 100%, and was 17% by IVP. Masses and blood vessel abnormality surrounding renal pelvis could be detected by endoluminal ultrasonography, but it was difficult for IVP. Endoluminal ultrasonography could be used to detect the ureter obstruction, while IVP could not. Conclusions: IVP can be used to display the whole shape of upper urinary tract in one picture while endoluminal ultrasonography can be used to detect tiny lesions of upper urinary tract precisely, and to detect their positions within or surrounding urinary tract correctly. IVP is good for screening, and it is better to perform endoluminal ultrasonography after IVP.
Differentiation of transitional cell carcinoma involving the distal ureter from benign ureteral obstruction: Assessment using transrectal ultrasonography and color Doppler imaging Kim HJ, Lim JW, Lee DH, Ko YT, Kyung Hee University Hospital, Korea Objectives: To evaluate the feasibility of transrectal ultrasonography (TRUS) and color Doppler imaging (CDI) for the differentiation of transitional cell carcinoma (TCC) involving the distal ureter from benign ureteral obstruction. Methods: Our study group consisted of twelve patients with TCC involving the distal ureter and eight patients with benign distal ureteral obstruction, such as fibrous stricture (n ⫽ 3), ureteral edema (n ⫽ 2), tuberculosis (n ⫽ 1), amyloidosis (n ⫽ 1) and fibroepithelial polyp (n ⫽ 1). The gray-scale images and CDI of the TRUS were retrospectively evaluated. Results: On gray-scale images, ureteral masses were identified in 83% (10/12) of TCC and 63% (5/8) of benign ureteral obstruction, and ureteral wall thickening in 17% (2/12) of TCC and 38% (3/8) of benign ureteral obstruction. Benign ureteral obstruction showed absence of blood flow in 38% (3/8) and several dot-like blood flows in 63% (5/8). TCC showed multiple (⬎3) dot-like blood flows in 33% (4/12), moderately increased blood flow in 58% (7/12), and prominent blood flow replacing more than half of the ureteral mass in 8% (1/12). Conclusions: Gray-scale imaging findings of TCC involving the distal ureter and benign ureteral obstruction were similar to both groups however CDI was helpful to differentiate TCC involving the distal ureter from benign ureteral obstruction.
2266
The accuracy of sonographic size measurement of tumormimicking phantoms under various scanning conditions Kim KW, Choi BI, Kim H-C, Park SH, Lee JY, Lee JM, Han JK, Park K-S, Asan Medical Center, University of Ulsan College of Medicine, Korea; Seoul National University Hospital, Seoul National University College of Medicine, Korea
A comparative study of endoluminal catheter-based ultrasonography and urography on diagnosis of renal pelvis neoplasm Hu B, Zhu J-A, Wu D-L, Feng L, Chen J, Shanghai Jiaotong University Affiliated Sixth People’s Hospital, China
Objectives: To investigate the accuracy of size measurement of tumormimicking phantoms under various scanning conditions. Methods: Agar-based tumor-mimicking phantoms containing 15 ham pieces (6 ⵑ 30 mm) were scanned with an HDI 5000 unit. Conventional and compound US images were obtained with changing transmitted frequency, target depth, focus depth and lateral off-center distance. Transverse and vertical diameters were measured on DICOM viewer. The percent measurement errors relative to reference data were analyzed to explore if there are significant differences according to the target size, change of the scanning parameters and between conventional and compound US. Results: The percent measurement errors of transverse and vertical diameter were larger, as target size decreased (p ⬍ .01). Both transverse and vertical diameters were significantly overestimated with low transmitted frequency, increase in target depth, and increase in lateral off-center distance (p ⬍ .01, respectively). Also, transverse diameters were significantly overestimated with discrepancy in depth of focus and target (p ⬍ .01). Compound US significantly overestimated transverse diameters than conventional US under various scanning conditions (p ⬍ .05, respectively), except for high transmitted frequency. Compound US significantly overestimated vertical diameters than conventional US with increase in lateral off-center distance (p ⫽ .0194, ⫽ .0156). Conclusions: Transverse and vertical diameters of echogenic lesion can be overestimated on US under various scanning conditions.
P143
Objectives: To study the endoluminal catheter-based ultrasonographic features of renal pelvis neoplasm by comparing with retrograde urography. Methods: Sixty models of neoplasms of renal pelvis in pigs were set up. The unequirotal and difform porcine meat, which were simulated as neoplasms, adhered to the different parts (upper, middle, lower pole; ventral or dorsal wall) of the renal pelvis .The renal pelvis neoplasms in 60 excised kidneys were evaluated by endoluminal catheter-based ultrasonography and retrograde urography, respectively. Results: Significant differences were found in the detectable rate of neoplasm between the ultrasonography and retrograde urography (98.9 % versus 58.6 %, p ⬍ 0.01). No significant differences in the unequirotal and difform neoplasms by ultrasonography (p ⬎ 0.05), but the results were reversed by retrograde urography ( p ⬍ 0.01). Both imaging techniques could evaluate the location of the neoplasm, but retrograde urography could not demonstrate the neoplasm from ventral or dorsal wall of renal pelvis. Endoluminal ultrasonography could display the echo-texture of the neoplasms and measure the its size precisely, but difficult to display lesions less than 1cm by urography. Conclusions: Endoluminal ultrasound has apparent advantages over retrograde urography especially in detecting the small size of renal pelvis neoplasm, which plays an important role in clinical applications.
2267 URETER 2265 A comparative study of endoluminal ultrasonography in the upper urinary tract Zhu JA, Hu B, Feng L, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, China Objectives: To compare the clinic value of endoluminal ultrasonography with IVP on diagnosis of diseases in the upper urinary tract in human. Methods: Thirty patients were examined by using endoluminal sonography and IVP. All the cases were confirmed by pathology or other techniques. Results: The detectable rate of tumor in renal pelvis as examined by ultrasonography was 92%, and was 54% by IVP. The detectable rate of tumor less than 10mm in size as examined by ultrasonography was 100%, and was 17% by IVP. Masses and blood vessel abnormality surrounding renal pelvis could be detected by endoluminal ultrasonography, but it was difficult for IVP. Endoluminal ultrasonography could be used to detect the ureter obstruction, while IVP could not. Conclusions: IVP can be used to display the whole shape of upper urinary tract in one picture while endoluminal ultrasonography can be used to detect tiny lesions of upper urinary tract precisely, and to detect their positions within or surrounding urinary tract correctly. IVP is good for screening, and it is better to perform endoluminal ultrasonography after IVP.
Differentiation of transitional cell carcinoma involving the distal ureter from benign ureteral obstruction: Assessment using transrectal ultrasonography and color Doppler imaging Kim HJ, Lim JW, Lee DH, Ko YT, Kyung Hee University Hospital, Korea Objectives: To evaluate the feasibility of transrectal ultrasonography (TRUS) and color Doppler imaging (CDI) for the differentiation of transitional cell carcinoma (TCC) involving the distal ureter from benign ureteral obstruction. Methods: Our study group consisted of twelve patients with TCC involving the distal ureter and eight patients with benign distal ureteral obstruction, such as fibrous stricture (n ⫽ 3), ureteral edema (n ⫽ 2), tuberculosis (n ⫽ 1), amyloidosis (n ⫽ 1) and fibroepithelial polyp (n ⫽ 1). The gray-scale images and CDI of the TRUS were retrospectively evaluated. Results: On gray-scale images, ureteral masses were identified in 83% (10/12) of TCC and 63% (5/8) of benign ureteral obstruction, and ureteral wall thickening in 17% (2/12) of TCC and 38% (3/8) of benign ureteral obstruction. Benign ureteral obstruction showed absence of blood flow in 38% (3/8) and several dot-like blood flows in 63% (5/8). TCC showed multiple (⬎3) dot-like blood flows in 33% (4/12), moderately increased blood flow in 58% (7/12), and prominent blood flow replacing more than half of the ureteral mass in 8% (1/12). Conclusions: Gray-scale imaging findings of TCC involving the distal ureter and benign ureteral obstruction were similar to both groups however CDI was helpful to differentiate TCC involving the distal ureter from benign ureteral obstruction.