Difference:
1, the resolution is different: the resolution of 64-slice CT is generally higher than that of 16-slice CT, and the image quality is also better than that of 16-slice CT, especially in three-dimensional imaging, the image of 64-slice CT is more detailed. Techniques used only in 64-slice CT, such as iterative algorithm, can now be widely used in 16-slice CT machines, which can greatly reduce radiation dose and improve image resolution.
2. Different scanning speeds: Generally speaking, the more rows of CT, the wider the width of the detector, and the wider the scanning range of one rotation of the tube, the faster the scanning speed will be. So 64-slice CT is faster than 16-slice CT.
3. Inspection of different parts: The quality of the tube used to generate X-rays by 64-row spiral CT is higher than that by 16-row CT, which can ensure continuous multi-part inspection by 64-row CT. Unlike some early 16-row spiral CT scans, due to the poor heat dissipation of the bulb tube, self-protection stopped scanning, which affected the efficiency of CT examination.
Extended data:
Precautions:
1, for those who need strengthening, fast for 4 hours before examination.
2. The detailed medical history and various examination results should be informed to the CT doctor. If there are preserved X-ray films, magnetic resonance films and previous CT films, they should be submitted to the CT doctor for reference.
3. Explain to the doctor whether there is any drug allergy, asthma, urticaria and other allergic diseases.
4. Take off clothes at the inspection site, including underwear with metallic substances and various items, such as headdress, hair clips, earrings, necklaces, Yu Pei, coins, belts and keys.
5, such as enhanced CT scanning or children, unconscious, must be accompanied by a healthy person.
6. If ionic contrast agent is used in enhanced CT scanning, iodine allergy test of intravenous contrast agent is needed. Only after 20 minutes, there is no response, and the inspection can be carried out.
Baidu encyclopedia -64-slice spiral CT
Baidu encyclopedia -Lightspeed 16 slice spiral CT