Objective To evaluate the image quality,diagnosis accuracy and dose reduction of split-bolus CT urography (CTU) with low voltage scan and sinogram affirmed iterative reconstruction (SAFIRE).Methods A total of 80 cases of consecutive patients with confirmed or suspected urinary system disease needed CTU examination were divided into two groups (control group and test group) by using random number table.In control group,convention scan (120 kV) with one time injection was used.But low voltage scan (80 kV) with SAFIRE algorithm and split-bolus injection (SBI) was used in experiment group.The radiation dose,image quality and diagnosis accuracy were compared.Results A total of 77 cases completed CTU examination successfully in the two groups,including 39 cases in control group and 38 cases in test group.The effective dose reduced from (26.68 ± 4.07) in control group to (3.93 ± 0.85) mSv in test group (t =-33.78,P ＜ 0.05).Subjective image quality score was (4.49 ± 0.79) in control group and (4.39 ± 1.53) in test group,with no significantly statistical difference (Z =2.71,P ＞ 0.05).Signal-to-noise ratio (SNR) of objective image quality in test group was higher than that in control group (127.3±15.9 vs.109.6 ± 13.2,t =4.49,P＜0.05).But there was no significantly statistical difference in contrast-to-noise ratio (CNR) between control group(100.8 ± 12.9)and test group (109.0 ± 14.4,P ＞ 0.05).For diagnosis accuracy,no statistical difference were found between two groups(84.62％ and 81.58％,P ＞ 0.05).Conclusions The combination of low voltage scan with SAFIRE algorithm and split-bolus injection CTU could reduce the radiation dose significantly,but the objective image quality,CNR (except SNR) of subjective image quality and diagnosis accuracy were all unaffected obviously.

Objective To investigate the elasticity of the radial artery wall in type 2 diabetes mellitus (T2DM) patients with elastosonography. Methods A total of 37 patients with T2DM and 42 normal subjects were studied with elastosonography. The systolic diameter (Ds) and diastolic diameter (Dd) of the radial artery were measured, and the strain ratio of the blood in the radial artery to the wall of the radial artery was calculated. Results The strain ratio of the radial artery in T2DM group was significantly higher than that in normal group (P＜0.05). There was no significant difference in Ds and Dd of the radial artery between T2DM group and the control group (P＞0.05). Conclusion The early change of the radial artery wall elasticity in patients with T2DM can be assessed with elastosonography.

Objective To investigate the enhanced CT and MRI imaging features of nasal sinus squamous cell carcinoma(SCC)and lymphoma(NHL),and to analyze the efficacy of different imaging features in differentiating nasal sinus SCC from NHL.Methods The imaging,clinical and pathological data of 67 patients with sinus SCC and NHL who underwent sinus CT and MRI with contrast CT and MRI in our hospital and confirmed by surgical pathology were retrospectively analyzed,and the tumor origin,maximum diameter,CT density,MRI signal intensity,enhancement degree,tumor internal necrosis,adjacent bone destruction,invasion of surrounding tissues,and The imaging features such as cervical lymph node metastasis within the scanning range were analyzed,and the receiver operating characteristic(ROC)curve and area under the curve(AUC)were used to analyze the efficacy of different imaging features to distinguish nasal sinus SCC and NHL.Results There were statistically significant differences between the five imaging features of nasal sinus SCC and NHL,including tumor origin,maximum diameter,internal tumor necrosis,surrounding bone destruction and peripheral tissue invasion(P＜0.05),and the AUC of differentiating SCC and NHL were 0.708,0.694,0.785,0.850 and 0.629,respectively.The AUC of SCC and NHL was 0.969,and the sensitivity and specificity were 83.9%and 97.2%,respectively.Conclusion On contrast-enhanced CT and MRI,the imaging signs of tumor origin,maximum diameter,tumor internal necrosis,bone destruction and surrounding tissue invasion are helpful to distinguish nasal sinus SCC from NHL,especially if the tumor originates in the nasal cavity,necrosis is rare,bone destruction is mild,and the possibility of nasal sinus NHL should be given priority.Contrast-enhanced CT and MRI can help differentiate nasal sinus SCC from NHL,and the combination can help improve differential diagnostic performance.

Patients in the intensive care unit (ICU) often need to have various catheters placed on their bodies due to their severe condition. In order to prevent the occurrence of unplanned extubation, patients' hands should be restrained appropriately. The current restraint gloves used in clinical practice have problems such as improper restraint, easy falling off of oxygen saturation monitoring probes, and pressure injury of hands. Therefore, department of critical care medicine, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine designed a wrist restraint glove suitable for restless patients, and obtained the national utility model patent (ZL 2020 2 1612453.7). The device is composed of restraint gloves and restraint rings, which can not only restrain patients, but also continuously monitor the changes of blood oxygen saturation in patients with restfulness. This device is convenient to use, low cost, comfortable to wear, and can prevent the occurrence of device-related pressure injuries, which is suitable for clinical application.
Humans ; Wrist ; Intensive Care Units ; Critical Care ; Hand ; Upper Extremity ; Restraint, Physical