Objective　To evaluate the value of high-freq uency ultrasound for dignosing erythema nodosum(EN).Methods　Twenty-six cases with EN confirmed by biopsy were studi ed by high-frequency ultrasound imaging.Results　Acute type(early,middle,and late stage)had a different s onographic feature when compared to chronic one. Conclusions　High frequency ultrasound has an important clinical value for the diagnosis of grade and degree of EN. The featunes of sonographic i mage in EN are in consistent with the pathological findings, indicating that i t is a new convenient and non-invasive method for the diagnosis of skin lesion s.

Cavernous transformation of the portal vein in children is a non-hepatic disease of portal hypertension.Color Doppler flow imaging was performed in 7 children with cavernous transformation of the portal vein.All cases were operated and diagnosis was confirned by pathology.The accuracy of diagnosis reached 100%.Some of these cases were examimed by portogram and CT.Three types of sonographs were classified by CDFI:I-extrahepatic I-intrahepatic and extrahepatic;II-intrahepatic.It is suggested that the combination of characteristic color Doppler flow and reahime appearance of cavenous transformation is virtually diagnostic.

Objective To evaluate the role of TVS in assessing endometrial pathology in women with postmenopausal bleeding and in evaluating the depth of myometrial invasion in endometrial carcinoma.Methods A group of 111 women with postmenopausal bleeding were examined by TVS,endometrial thickness,echotexture,blood flow characteristics were evaluated.Results An endometrial thickness less than 5 mm was associated with normal or benign condition.This suggested that endometrial biopsy or curettage might not be necessary in this situation,visualization of abnormal blood flow within the endometrium in the endometrial carcinoma with mean resistance index constituted a statistical difference compared with that of benign endometrium(P<0.05).TVS accurately detected depth of myometrial invasion in endometrial carcinoma,and had significant relation with pathologic assessment(r=0.98,P<0.001).Conclusion TVS could be implemented as a routine first-step procedure in patients with postmenopausal bleeding.

Objective　To apply high frequency ultrasound to laser treatment of children facial subcutaneous cavernous hemangiomas.Methods　Ten children with facial subcutaneous hemangiomas were treated with Nd:YAG laser, the process was supervised with high frequency ultrasound.Results　Before treatment,tumors showed low and inhomogenous echogenicity with blood flow signal;after treatment,the tumors appeared high and homogenous echogenicity with little or no blood flow signal. Conclusions　The high frequency ultrasound is helpful for laser treatment of facial subcutaneous cavernous hemangiomas in preoperative location and postoperative assessment.

Seventy-four cases of infertility were examined to study the hemodynamics of the bilateral ovarian arteries at 21st day during the corpus luteum phase by color Doppler energy(CDE) and color Doppler flow imaging (CDFI). All the patients were verified by laparoscopy, fallopian tube patency examination and ovarian function test. Twenty-two healthy women served as controls. The results showed that the difference of resistance index（RI）and pulsatility index (PI) of bilateral ovarian arteries between the infertility and the normal controls had statistical significance (P<0.01), and the PI showed negative correlation with the thickness of endometrium (left side: r=0.724, P<0.01; right side: r=0.756, P<0.01). The results also showed that CDE was more sensitive than CDFI in displaying the ovarian arteries. It could be concluded that the elevated resistance of ovarian artery during the corpus luteum phase was one of the important factors that resulted in infertility.

Seventy-four cases of infertility were examined to study the hemodynamics of the bilateral ovarian arteries at 21st day during the corpus luteum phase by color Doppler energy(CDE) and color Doppler flow imaging (CDFI). All the patients were verified by laparoscopy, fallopian tube patency examination and ovarian function test. Twenty-two healthy women served as controls. The results showed that the difference of resistance index（RI）and pulsatility index (PI) of bilateral ovarian arteries between the infertility and the normal controls had statistical significance (P<0.01), and the PI showed negative correlation with the thickness of endometrium (left side: r=0.724, P<0.01; right side: r=0.756, P<0.01). The results also showed that CDE was more sensitive than CDFI in displaying the ovarian arteries. It could be concluded that the elevated resistance of ovarian artery during the corpus luteum phase was one of the important factors that resulted in infertility.