ISSN:0091-2751    

DOI:10.1002/jcu.1870210402

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractImage‐directed Doppler ultrasonography has been used to measure changes in hepatic arterial and portal venous blood flows in 22 controls and 88 patients with colorectal cancer. Doppler Perfusion Index, (DPI, ratio of hepatic arterial to total liver blood flow) and Doppler Flow Ratio (DFR, ratio of hepatic arterial to portal venous blood flow) of controls and patients with overt liver metastases were clearly separated (p<0.0001). There was a significant reduction in the Hepatic Arterial Resistive Index (HARI) of patients with overt liver metastases (p<0.0001). Percentage Hepatic Replacement (PHR) by metastases, measured using a computed tomography scanner, did not correlate with DFR or DPI. The results suggest that the measurement of hepatic perfusion changes using image‐directed Doppler ultrasonography may be of value in the detection of small liver metastases. © 1993 John Wiley&Sons,

ISSN:0091-2751    

DOI:10.1002/jcu.1870210403

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractA total of 30 patients with suspected urethral strictures underwent sonographic and roentgenographic urethrograms. Two patients showed a normal anterior urethra in the sonourethrogram; 29 strictures were diagnosed in the remaining 28 patients, 1 patient showing strictures at two different sites. Sonourethrography was an accurate predictor of stricture length, retrograde urethrography underestimating the stricture length in most of the cases. Periurethral structures, including the urethral wall, corpus spongiosum, corpora cavernosa, bulb, and external urinary sphincter, were seen clearly with sonourethrography. Periurethral fibrosis was seen in 16 patients and graded as mild (n = 5), moderate (n = 2) or severe (n = 9), depending on the depth of involvement of the corpus spongiosum. Sonourethrography was unsatisfactory in the evaluation of membranous strictures, failing to visualize the proximal limit of the stricture. © 1993 John Wiley&Sons, Inc

ISSN:0091-2751    

DOI:10.1002/jcu.1870210404

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractDuring pregnancy, leiomyomas may cause complications such as spontaneous abortion, premature labor, and obstruction of labor. The conventional real‐time ultrasound examination usually detects myomas adequately, but, in some cases, a local thickening of the uterine wall persists throughout the examination, interfering with the differentiation between myoma and contraction. In such cases, repeat scanning approximately 30 minutes later differentiates contractions, which usually resolve, from myomas.We examined 10 patients with B mode and color Doppler ultrasonography. In the 5 patients with myoma, we observed splaying of the vessels around the mass, whereas in the 5 patients with contraction, there was no vessel displacement in the area of the local myometrial thickening. The use of color Doppler and observation of these findings may obviate a prolonged ultrasound examination in questionable cases. © 1993 John Wiley&Sons, I

ISSN:0091-2751    

DOI:10.1002/jcu.1870210405

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractUltrasonography is considered to have limited application in respiratory diseases because air reflects sound waves. Twenty‐four patients with radiologically confirmed pneumothorax and 100 healthy subjects underwent sonography. In all normal subjects, the hyperechoic pulmonary interface showed respiratory motions termed the “gliding sign” with some comet‐tail artifacts. Sonographic signs were shown in all pneumothoraces: disappearance of the gliding sign and no comet tails. The extent of collapse cannot be evaluated, but it is possible to determine its area in partial pneumothorax (N = 5). The follow‐up (N = 8) showed the reappearance of the gliding sign. Ultrasonography may be helpful in diagnosing pneumothorax in certain cases. © 1993 John Wiley

ISSN:0091-2751    

DOI:10.1002/jcu.1870210406

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

摘要:

AbstractThe results of shock‐wave treatment of gallbladder stones depend to a very high degree on the quality and expertise of ultrasonography applied before, during, and after shock‐wave disintegration of the stones. Ultrasonography is decisive in evaluating the inclusion criteria; it is the method of choice for directing the shockwave energy at the stones and monitoring the disintegration process. It is the only diagnostic modality to really demonstrate the gallbladder being free from stones. © 1993 John Wiley&Sons,

ISSN:0091-2751    

DOI:10.1002/jcu.1870210407

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870210408

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870210409

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870210410

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY

ISSN:0091-2751    

DOI:10.1002/jcu.1870210411

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1993

数据来源: WILEY