MRI vs. CT Scan CT Scans | MRI MRI and CT scans have several differences, though your doctor uses both for imaging. Find out why your doctor may recommend one over the other and how they differ. What sets these scans apart is critical in choosing the right one for diagnosis. Discover...
如果是骨折或頭部外傷,或是要大致掃描內臟器官,通常會建議進行CT掃描。 CT、MRI以及PET等常見醫療檢查費用不菲,但卻對偵測早期癌症或重症極有幫助,是一筆不可節省的費用。信諾自願醫保系列靈活計劃(優越)就「診斷成像檢測」提供全數賠償,終身保障限額更高達$2,000萬,按此了解詳情。 資料來源: CT Scan vs. MRI ...
The CT scanner looks like a large donut with a narrow table in the middle. Unlike MRI, in which the patient would be placed inside the tunnel of the scanner, when undergoing a CT scan, the patient rarely experiences claustrophobiabecause of the openness of the doughnut shape of the scanner....
香港人工作忙碌,经常加班熬夜。要预防过劳猝死,市面上有不少体检计划,包括全身磁共振(MRI)、正电子及电脑双融扫描(PET/ CT Scan)等放射诊断项,看似更全面和高效率,可快速发现隐疾,但对于无病无痛的人士…
CT是X线计算机断层成像，优点是扫描速度快（几秒钟），对骨骼和肺组织分辨率高，检测费用较低。缺点主要...
candidates including those with aneurysm clips (unless the clips are MRI-safe), cardiac pacemakers or defibrillators, any metal parts or shaving inside the body (strong magnets will pull them out). Apart from those limitations, MRI scans are safe, painless and have no ill effects on the body...
2. What Is the Difference Between a CT Scan and an MRI? X-rays and CT scans both use a small dose of ionizing radiation to produce images. An MRI scan, however, doesn’t work this way. It uses powerful magnets and radio waves to create the images instead of ionizing radiation. So,...
所谓的轴扫(Axial scan),有些书又把它叫做序列扫描(Sequential scan)。这种扫描模式是最早期的CT扫描模式,又叫做步进式扫描或者step-stop,步进-采集模式,slice-by-slice。 这种扫描模式首先扫描床步进到所需要成像的位置;扫描床停止运动;球管和探测器旋转360°(采集数据);球管和探测器停止工作;扫描床再次移动到下...
CT Scan、PET Scan和MRI都是常用的影像診斷技術,簡而言之,就是透過影像呈現體內狀況,幫助醫生斷症。然而,即使同一個身體部位出現病徵,醫生也會按照病情需要,建議病人接受不同的檢測。病人或許會感到疑惑,CT、PET和MRI到底有甚麼分別?哪些病症適合用哪種技術?掃瞄出
PET是功能成像 CT MRI是解剖成像 PET：灵敏度高，特异性不强（就是说只要发现异常的能力较好，但是异常有可能是生理正常的现象所致），分辨率较低 CT：CT为无创性检查，检查方便、快捷。 密度分辨力高，密度相差很小的不同组织通过窗技术就能能被区分(提供2000Hu左右)。 CT能提供横断面图象，并可进行...