CT常识

发布者:
二手核磁
最后修订:
2017年06月15日 02:45
CT维修维护 4437
 
 
 
 
 
 
 

公司名称:合肥迅即影像科技有限公司

地址:中国·安徽省·合肥市玉兰大道与汤口路交口(驭翔车检院内西侧南二楼)
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需要MRI、CT维修,配件,联系+8613805690379。更多信息,更多服务。
 
CT(X线电子计算机断层扫描)是利用X线断层扫描,电光子探测器接收,并把信号转化为数字输入电子计算机,再由计算机转化为图像,CT是一种无痛苦、无损伤、无危险、快速、方便,适合于任何年龄且准确性高的辅助检查工具。CT于1970年在英国设计成功,1973年首次报告在临床应用中对脑部疾病的诊断价值,自1976年综合报告6500例癫痫患者的CT检查结果以来,国内外已相继开展此项检查,大大提高了颅内病变(占位性病变、血管病变、脑发育畸形及脑萎缩等结构性脑损害)的诊断水平,对癫痫病灶的立体定位、判断病变病理特征和病因 分析较为可靠。CT检查包括CT平扫(即不注射造影剂的常规CT)和 CT增强扫描(即经静脉注入造影剂进行扫描 的方法)。
由于CT的应用,癫痫的病因确诊率大为提高,CT检查不但能显示出病变的部位、形态以及与周围脑组织的关系,并以此做出定性分析,而且还能发现仅有密度上的改 变而无占位效应的病变。CT发现癫痫患者的主要改变有 脑萎缩、脑新生物、脑梗死、脑发育异常、脑积水、钙化 和动静脉畸形等。

1、CT的特点:CT是计算机体层摄影的简称,1969年设计成功,具有检查方便、安全、无痛苦、无创伤的特点。CT片图像清晰、分辩力高、解剖关系明确、病态显影清楚。

2、作脑部CT检查的目的:很多原因均可引发癫痫病,比如脑萎缩、脑发育不全或迟缓、脑肿瘤、脑血管畸形、脑梗塞、脑积水、脑畸形、脑软化、脑钙化灶、未明原因或性质的高密度改变、低密度改变等等。如脑内有上述病变,CT检查即可发现,如CT片显示正常,一般可排除上述病变的存在。
CT(电子计算机体层成像)是70年代初放射诊断的一项重大突破,CT不是X线摄影,而是用X线对人体扫描,取得信息,经电子计算机处理而获得的重建图像。它能使传统的X线检查难以显示的器官及其病变显示成像,且图像逼真,解剖关系明确,从而扩大了人体的检查范围,大大提高了病变的早期检出率和诊断准确率。这种检查简便、安全、无痛苦、无创伤、无危险,它促进了医学影像诊断学的发展,发明者获得了1979年的诺贝尔奖金。CT最初只用于头部检查,1974年又出现了全身CT。在短短10余年间,CT已遍及全球,从第一代发展到第五代。我国各大城市医院所使用的CT多属第三代。全身CT可以作头、胸、腹、骨盆的横断扫描,也可作甲状腺、脊柱、关节和软组织及五官等小部位的区域扫描。CT最适于查明占位性病变如肿瘤、囊肿、增大的淋巴结、血肿、脓肿和肉芽肿的大小、形态、数目和侵犯范围,它可以决定某些器官癌肿的分期和是否能进行手术切除。在某些情况下,CT还能区别病变的病理特性如实性、囊性、血管性、炎性、钙性、脂肪等。

CT检查有三种方法,一是平扫,为普通扫描,是常规检查;二是增强扫描,从静脉注入水溶性有机碘,再进行扫描,可以使某些病变显示更清楚;三是造影扫描,先行器官或结构的造影,再行扫描,如向脑池内注入造影剂或空气进行脑池造影,再扫描,可清楚显示脑池及其中的小肿瘤。

在CT检查前,病人的准备也很简单,只要检查前禁食即可。但腹部检查之前不能做其它造影检查,尤其不能用钡剂行消化道造影,以免肠内残留的造影剂形成伪影,影响CT图像质量,从而导致误诊。在头部扫描之前,应先照X线头颅平片和断层照片。肝、胆、胰检查前,要先做各项化验检查,照腹部平片,胆道造影和超声检查。肾脏检查前,应做肾盂造影和B超检查。胸部检查前,应照胸部平片和断层照片。脊柱检查前,要先行脊柱正侧、斜位照片等。以便选择最佳扫描方式和最合理的扫描范围

CT(电子计算机体层成像)是70年代初放射诊断的一项重大突破,CT不是X线摄影,而是用X线对人体扫描,取得信息,经电子计算机处理而获得的重建图像。它能使传统的X线检查难以显示的器官及其病变显示成像,且图像逼真,解剖关系明确,从而扩大了人体的检查范围,大大提高了病变的早期检出率和诊断准确率。这种检查简便、安全、无痛苦、无创伤、无危险,它促进了医学影像诊断学的发展,发明者获得了1979年的诺贝尔奖金。CT最初只用于头部检查,1974年又出现了全身CT。在短短10余年间,CT已遍及全球,从第一代发展到第五代。我国各大城市医院所使用的CT多属第三代。全身CT可以作头、胸、腹、骨盆的横断扫描,也可作甲状腺、脊柱、关节和软组织及五官等小部位的区域扫描。CT最适于查明占位性病变如肿瘤、囊肿、增大的淋巴结、血肿、脓肿和肉芽肿的大小、形态、数目和侵犯范围,它可以决定某些器官癌肿的分期和是否能进行手术切除。在某些情况下,CT还能区别病变的病理特性如实性、囊性、血管性、炎性、钙性、脂肪等。

CT检查有三种方法,一是平扫,为普通扫描,是常规检查;二是增强扫描,从静脉注入水溶性有机碘,再进行扫描,可以使某些病变显示更清楚;三是造影扫描,先行器官或结构的造影,再行扫描,如向脑池内注入造影剂或空气进行脑池造影,再扫描,可清楚显示脑池及其中的小肿瘤。

在CT检查前,病人的准备也很简单,只要检查前禁食即可。但腹部检查之前不能做其它造影检查,尤其不能用钡剂行消化道造影,以免肠内残留的造影剂形成伪影,影响CT图像质量,从而导致误诊。在头部扫描之前,应先照X线头颅平片和断层照片。肝、胆、胰检查前,要先做各项化验检查,照腹部平片,胆道造影和超声检查。肾脏检查前,应做肾盂造影和B超检查。胸部检查前,应照胸部平片和断层照片。脊柱检查前,要先行脊柱正侧、斜位照片等。以便选择最佳扫描方式和最合理的扫描范围。
 
 
 

 

 
 
 
 
 
 
 
 
 
Need MRI, CT maintenance, spare parts , contact +8613805690379 . More information , more services .
 
CT (X -line computer tomography ) is the use of X-ray tomography , electro-optical detector receives the child , and to the input signal into a digital computer , and then from the computer into an image , CT is a painless , non-invasive , non- dangerous , fast , convenient and suitable for any age and high accuracy secondary inspection tool. CT in 1970 in British design success , in 1973 first reported in clinical applications for the diagnosis of brain diseases , from 6,500 cases in 1976, consolidated report CT findings in patients with epilepsy since , at home and abroad have been carrying out this check , greatly increased intracranial lesions ( lesions, vascular lesions , brain malformations and brain atrophy and other structural brain damage ) diagnostic level , three-dimensional localization of epileptic foci , to determine the cause of disease pathology and more reliable . CT examination including CT scan ( ie, not the regular injection of contrast medium CT) and CT scan ( ie, intravenous injection of contrast agent for scanning method ) .
Since CT applications, the cause of epilepsy diagnosis rate greatly improved , CT examination showed lesions not only the location, shape , and the relationship with the surrounding brain tissue , and thus to make a qualitative analysis , but also found that only on the density change without mass effect of the lesion. CT findings in patients with epilepsy major changes with brain atrophy , brain neoplasm , cerebral infarction , cerebral abnormalities , hydrocephalus , calcification and arteriovenous malformations.

1, CT features : CT is short for computed tomography , 1969 successfully design , with checks convenient, safe , painless , non-invasive characteristics. CT slice image clarity, differentiate force, anatomical relationship clear , morbid developing clear.

2 , for the purpose of brain CT examination : Many things can trigger epilepsy, such as brain atrophy , cerebral hypoplasia or retardation, brain tumors, vascular malformations , cerebral infarction , hydrocephalus , brain malformations, softening of the brain , cerebral calcification stoves, unknown cause or nature of the change in high-density , low density change and so on. If the above brain lesions , CT examination can be found , such as CT films showed normal , generally exclude the presence of the lesion .
CT ( computer tomography ) is in the early 1970s a major breakthrough in diagnostic radiology , CT instead of X -ray photography , but with X-rays on the human body scanning , access to information , obtained by computer processing of the reconstructed image . It enables conventional X -ray examination of organs and lesions difficult to show display imaging, and image fidelity , clear anatomical relationship , thereby expanding the scope of the inspection body , greatly improving the detection rate of early lesions and diagnostic accuracy. This check is simple, safe , painless , non-invasive, non-hazardous , it promotes the development of medical diagnostic imaging , the inventors won the Nobel Prize in 1979 . Initially used only for head CT examination, appeared in 1974, the body CT. In just more than 10 years , CT has been all over the world , from the first generation to the fifth generation . China's major urban hospitals are mostly used by the third generation CT . Body CT can be used for head, chest , abdomen, pelvis, cross-sectional scans , but also for the thyroid , spine, joints and soft tissue and facial features and other small parts of the area scanned. CT is best suited to identify lesions such as tumors , cysts, enlarged lymph nodes , hematoma, abscess and granuloma size, shape , number and scope of violations , it can determine the stage of cancer and certain organs whether for surgical excision. In some cases , CT can accurately distinguish characteristics of pathological lesions , cystic , vascular, inflammatory , calcic , fat .

CT examination , there are three ways, first scan, as an ordinary scanning is routine examination ; Second, enhanced scan , from intravenous injection of soluble organic iodine, then scanned , you can make some of the lesions show more clearly ; Third, CAT scan , first organ or structure imaging, scanning again , such as the intracisternal injection of contrast agent or air cisternography , and then scan clearly shows that the small pool and its brain tumors.

Before the CT examination , the patient's preparation is also very simple , as long as you can before the examination fasting . But before the test can not do other abdominal angiography , especially not with gastrointestinal contrast barium line to avoid the formation of intestinal residual contrast agent artifacts affect CT image quality , resulting in misdiagnosis. Before scanning the head , according to X-ray the skull should be flat sheet and faults photos. Liver, gallbladder, pancreas before the inspection , the laboratory should first check , according to KUB , cholangiography and ultrasound. Kidneys before the examination , should be done pyelography and B-ultrasound. Chest examination , should shine chest radiograph and CT pictures. Spine before the examination , to advance the positive side of the spine , oblique photos. Choose the best way to scan the scanning range and the most reasonable

CT ( computer tomography ) is in the early 1970s a major breakthrough in diagnostic radiology , CT instead of X -ray photography , but with X-rays on the human body scanning , access to information , obtained by computer processing of the reconstructed image . It enables conventional X -ray examination of organs and lesions difficult to show display imaging, and image fidelity , clear anatomical relationship , thereby expanding the scope of the inspection body , greatly improving the detection rate of early lesions and diagnostic accuracy. This check is simple, safe , painless , non-invasive, non-hazardous , it promotes the development of medical diagnostic imaging , the inventors won the Nobel Prize in 1979 . Initially used only for head CT examination, appeared in 1974, the body CT. In just more than 10 years , CT has been all over the world , from the first generation to the fifth generation . China's major urban hospitals are mostly used by the third generation CT . Body CT can be used for head, chest , abdomen, pelvis, cross-sectional scans , but also for the thyroid , spine, joints and soft tissue and facial features and other small parts of the area scanned. CT is best suited to identify lesions such as tumors , cysts, enlarged lymph nodes , hematoma, abscess and granuloma size, shape , number and scope of violations , it can determine the stage of cancer and certain organs whether for surgical excision. In some cases , CT can accurately distinguish characteristics of pathological lesions , cystic , vascular, inflammatory , calcic , fat .

CT examination , there are three ways, first scan, as an ordinary scanning is routine examination ; Second, enhanced scan , from intravenous injection of soluble organic iodine, then scanned , you can make some of the lesions show more clearly ; Third, CAT scan , first organ or structure imaging, scanning again , such as the intracisternal injection of contrast agent or air cisternography , and then scan clearly shows that the small pool and its brain tumors.

Before the CT examination , the patient's preparation is also very simple , as long as you can before the examination fasting . But before the test can not do other abdominal angiography , especially not with gastrointestinal contrast barium line to avoid the formation of intestinal residual contrast agent artifacts affect CT image quality , resulting in misdiagnosis. Before scanning the head , according to X-ray the skull should be flat sheet and faults photos. Liver, gallbladder, pancreas before the inspection , the laboratory should first check , according to KUB , cholangiography and ultrasound. Kidneys before the examination , should be done pyelography and B-ultrasound. Chest examination , should shine chest radiograph and CT pictures. Spine before the examination , to advance the positive side of the spine , oblique photos. Choose the best way to scan the scanning range and the most reasonable .


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