查询词典 helical scan

Therefore this imaging system can realize two kinds of X-ray radiology: reverse geometry X-ray and X-Scan imaging, and several CT scanning methods, such as equiangular fan-beam CT, equispatial fan-beam CT, helical/spiral CT, cone-beam CT with circle orbit, cone-beam CT with circle-plus-line orbit.

这样就可以实现倒置结构的X射线成像方法、等角扇束的扫描方法，以及本文所提出的凹面源加点探测器的锥形束扫描方法，而且还避免了使用成组点探测器带来的性能不一致性。

Objective To explore the value of helical CT scan in the diagnosis of gall bladder carcinoma.

目的 探讨螺旋CT多期增强扫描在胆囊癌诊断中的作用。

Helical CT multi-phase scan is of great value in the diagnosis and differential diagnosis of small RCC.

螺旋CT多期增强扫描对小肾癌的诊断与鉴别诊断有重要价值。

Materials and Methods: 25 patients with duodenal neoplasm underwent helical CT scan and three-dimensional (3D) reconstruction. Contrast enhanced CT scan were performed in 15 patients.

材料和方法：对 2 5例十二指肠肿瘤的患者行螺旋CT扫描，其中 15例行增强扫描，并结合三维重建进行观察。

Objective To study the effect of helical CT scanning dose and slice thickness on lung density, and to determine whether the lung density value measured by standard dose helical CT scan can be used for low dose helical CT scan.

目的 探讨螺旋CT扫描剂量、层厚是否对肺密度有影响，以决定常规剂量螺旋CT扫描测得的肺密度值能否适用于低剂量螺旋CT。

Especially in the major hospitals in Beijing (like Jung, Concord, Fuwai, Beijing Military General Hospital, etc.) are now called helical scan of the 64 inspection equipment, they do not have heart surgery will be able to check the status of the blood vessels, said to the shortcomings of is sometimes not very clear, the problem is found at that time is not satisfied, it will have to undergo an operation.

尤其是在北京的大医院(象安贞、协和、阜外，北京军区总院等)现在都有一种叫64位螺旋扫描的检查设备，可以不做手术就能检查心脏的血管状态，据说缺点是有时不是很清楚，就是发现问题当时也不能解决，还得动手术。

Methods Catphan phantom scans on GE LightSpeed VCT were used to optimize the protocols for HRCT application with helical scan modes.

多排螺旋CT扫描可以在一次屏气中得到高分辨力的容积数据，并可与常规胸部CT通过1次扫描不同方法重建完成，受到国内外学者的关注[1-2]。

Methods: Forty five lesions in 42 patients, including 22 lesions of breast cancer and 23 benign breast lesions, were examined by multi-slice helical CT with plain scan and multiphase enhanced scan.

42例45个病灶，其中乳腺癌病灶22个，乳腺良性病变23个（乳腺炎9个，乳腺纤维瘤4个，乳腺增生性疾病10个），行多层螺旋CT扫描平扫，并于增强后60、120、180、300、480 s进行多期增强扫描。

The parabolic dish antenna provided helical scan for air search, and conical scanning for precision tracking.

工作频率在2700~2900MHz。

Results: Among 53 positive cases , single nodus was found in 47 cases, with 21 in left lung and 26 in right lung. The diameter ranged from 0.5cm to 3.0cm. Rugged edge and vascular figure were clearer in helical than in routine scan. Double noduses were found in 2 cases and all proved to be benign later , with one as tuberculosis and the other as nonspecific infection. Multiple noduses of both lungs were found in 4, with 3 as carcinomatous metastasis and 1 as tuberculosis. Among 100 controls in whom no nodus was found in routine CT scan ,a nodus (0.5cm) was found in 92 cases to have health examination and 2 was found in 8 cases with cancer (6 with esophagus cancer and 2 with lung cancer ).

结果：阳性者53例中，单个结节47例（左肺21例右肺26例），结节直径（0.5cm-3.0cm），比常规扫描更能检出结节边缘凹凸不平及肿瘤供血血管。2个结节2例均为良性（一例手术病理证实为结核，1例抗炎治疗后吸收痊愈），双肺多发性结节4例（3例为转移瘤，一例为结核），常规扫描无阳性发现者100例做三维重建，其中92例作健康体检者检出一个结节（0.5cm）；8例有癌性病史患者（食道癌6例肺癌2例），检出两例有结节。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失