64-Slice spiral double-low CT to evaluate the degree of stenosis and plaque composition in diagnosing coronary artery disease

A feasibility study of 70 kV double low-dose coronary imaging technique in abdomen-fatty patients using dual-source CT

Objective

To investigate the aplication of low contrast agent concentration and low tube voltage in coronary CTA on patients with high BMI (26kg/m228kg/m2).

Methods

60 patients with high BMI (26kg/m228kg/m2) were randomly divided into two groups: double low group A (n=30, tube voltage = 70 KV), double low group B (n=30, tube voltage = 70 KV), processed by SAFIRE iterative reconstruction with 270 mgI/ml contrast agent. Conventional group a (n=30, tube voltage = 120 KV), conventional group b (n=30, tube voltage = 120 KV), with filtered back projection (FBP) and 370 mg I/ml contrast agent. the image excellent index (FOM), the effective radiation dose (ED), mean CT value, signal-to-noise ratio (SNR), and contrast-to-noise ratio(CNR) between corresponding groups were compared.

Result

There was no significant difference in subjective scores of coronary artery image quality between the two high BMI subgroups (P>0.05).The ED of group A (1.103±0.101 mSv) was significantly lower than that of group a (4.663±0.412 mSv) (P<0.001).There was no significant difference in mean CT value, SNR and CNR between the two subgroups (P>0.05).The image excellent index (FOM) of group A was higher than that of group a (P<0.05).The total iodine content and iodine injection rate in group A were lower than those in group a (P<0.001).The difference of subjective scores of coronary artery image quality between the two ultra-high subgroups was significant. The mean CT value, SNR and CNR of group B were lower than those of group b (P<0.05). The images of 14 patients in group B could not meet the diagnosis demand.

Conclusion

It is feasible to reduce the tube voltage to 70KV in patients with abdominal BMI with high BMI (26Kg/m228Kg/m2), under the same conditions, the 70KV can not meet the daily diagnosis requirement.

Efficacy of Yangxin Recipe in Combination with Conventional Western Medicine in Treatment of Angina Pectoris of Coronary Heart Disease

Objective

To study the efficacy of Yangxin Recipe (YXR) in patients with stable angina pectoris of coronary heart disease and its impacts on coronary CT angiography.

Methods

A total of 78 patients with coronary heart disease and angina pectoris were randomly divided into a control group (n = 39) and a YXR group (n = 39). The control group adopted conventional Western medicine while the YXR group received conventional western medicine + oral administration of YXR. After six months of continuous treatment, the clinical efficacy, traditional Chinese medicine (TCM) syndrome scores, Pittsburgh Sleep Quality Index (PSQI), and the level of coronary CT vascular stenosis were observed.

Results

After treatment, the total effective rate of YXR was 92.31%, which was higher than (P < 0.01) that of the western medicine control group. The total score of TCM syndromes in the YXR group was (14.44 ± 9.87), which was significantly lower than (P < 0.001) that in the simple western medicine control group (22.44 ± 13.87). The degree of coronary stenosis in the YXR group decreased to (49.87 ± 7.82) %, which was significantly lower than (P < 0.001) that in the western medicine control group (57.05 ± 9.92) %.

Conclusion

The efficacy of YXR + conventional western medicine in treating coronary heart disease and angina pectoris is significantly improved compared with the simple conventional western medicine.

Stereo information of skeletal data based on CT sequence medical images

In order to study the three-dimensional information of skeletal data from CT (Computed Tomography) serial medical images, 100 cases of distal posterior tibial fracture were selected, X-ray films of ankle joint were taken, and plain CT scan and three-dimensional reconstruction were performed to evaluate the fracture situation. According to the CT images, the cases were divided into posterior Pilon fracture and posterior ankle fracture. The results showed that Pilon fracture accounted for 62% and there were 39 males and 23 females, 32 left and 30 right. There were 38 cases of posterior ankle fracture, 28 males and 10 females, 20 left and 18 right. There were many types and forms of posterior Pilon fracture and posterior ankle fracture. It showed that the main cause of distal posterior tibial fracture is violence. Axial violence of tibia or torsional violence of lower limbs often causes Pilon fracture. Avulsion fracture caused by torsional violence mostly belongs to posterior ankle fracture. To sum up, stereoscopic information of bone data was obtained through CT images of tibia.