Objective:To verify the effect of Fu′s massage combined with physical therapy technology in rapidly relieving neck and low back pain caused by long-haul flight.Methods:Forty-two male volunteers were divided into 8, 12, 16, 24 and 48 h groups according to the simulated flying hours. After the completion of the simulated long-haul flight, the 5 groups of volunteers were immediately treated with Fu′s massage combined with physical factors for neck and low back pain. The Visual Analogue Scale (VAS) was used to evaluate the cervical and lumbar pain of volunteers after simulated flight and after treatment, and the treatment effect was before treatment analyzed.Results:There were significant differences in the VAS scores of cervical and lumbar regions before treatment among volunteers with different flying hours ( H=-30.15, -28.25, both P<0.001). The VAS scores of cervical and lumbar regions of volunteers in the 24 h and 48 h groups were higher than those in the 8 h group ( P=0.002, <0.001, =0.002, <0.001). The VAS scores of cervical and lumbar regions of volunteers in the 48 h group were higher than those in the 12 h group ( P=0.016, 0.001). The VAS score of cervical region of volunteers in the 48 h group was higher than that in the 16 h group ( P=0.033). After the intervention of Fu's massage combined with physical therapy, the VAS scores of cervical and lumbar regions in each group were lower than those before treatment, and the differences were significant ( t/ Z=-3.00-17.00, all P<0.05 or 0.01). Conclusions:Fu′s massage manipulation combined with physical treatment can effectively relieve the neck and low back pain caused by long-haul flight, which can be widely used as a relief method.

Objective:To verify the effect of Fu′s massage combined with physical therapy technology in rapidly relieving neck and low back pain caused by long-haul flight.Methods:Forty-two male volunteers were divided into 8, 12, 16, 24 and 48 h groups according to the simulated flying hours. After the completion of the simulated long-haul flight, the 5 groups of volunteers were immediately treated with Fu′s massage combined with physical factors for neck and low back pain. The Visual Analogue Scale (VAS) was used to evaluate the cervical and lumbar pain of volunteers after simulated flight and after treatment, and the treatment effect was before treatment analyzed.Results:There were significant differences in the VAS scores of cervical and lumbar regions before treatment among volunteers with different flying hours ( H=-30.15, -28.25, both P<0.001). The VAS scores of cervical and lumbar regions of volunteers in the 24 h and 48 h groups were higher than those in the 8 h group ( P=0.002, <0.001, =0.002, <0.001). The VAS scores of cervical and lumbar regions of volunteers in the 48 h group were higher than those in the 12 h group ( P=0.016, 0.001). The VAS score of cervical region of volunteers in the 48 h group was higher than that in the 16 h group ( P=0.033). After the intervention of Fu's massage combined with physical therapy, the VAS scores of cervical and lumbar regions in each group were lower than those before treatment, and the differences were significant ( t/ Z=-3.00-17.00, all P<0.05 or 0.01). Conclusions:Fu′s massage manipulation combined with physical treatment can effectively relieve the neck and low back pain caused by long-haul flight, which can be widely used as a relief method.

Objective To provide physiological basis of cerebral function identification of pilots in hypoxic environment by observing the pilots' cerebral blood perfusion characteristics before and after hypoxic exposure.Methods Thirty-five healthy male pilots were subjected to normal and hypoxic exposure that the oxygen concentration was 14.5％.We inspected the cerebral blood perfusion by arterial spin labeling technology and compared the differences between the two states.Results After hypoxic exposure,the pulse was (63.97± 10.43) beats/min (t=4.969,P＜0.01),it was lower than before which was (71.46±10.63) beats/min.The oxygen saturation was (92.46±3.64)％,it was lower than before which was (96.31±1.23)％ (t=6.437,P＜0.01).Arterial spin labeling (ASL) in pilots after hypoxic exposure showed lower cerebral blood flow (CBF) values prominently in the following regions:the bilateral superior temporal gyrus,the bilateral middle temporal gyrus,the left inferior temporal gyrus,the right middle occipital gyrus,the right inferior occipital gyrus,the bilateral lingual gyrus,the right fusiform gyrus,the right cuneus and cerebellum (P＜0.05).Conclusions The cerebral blood perfusion after hypoxic exposure is decreased mainly in the temporal and occipital lobe for the right side,and arterial spin-labeling technique can monitor CBF changes of the pilots in hypoxic exposure.

Objective To provide physiological basis of cerebral function identification of pilots in hypoxic environment by observing the pilots' cerebral blood perfusion characteristics before and after hypoxic exposure.Methods Thirty-five healthy male pilots were subjected to normal and hypoxic exposure that the oxygen concentration was 14.5％.We inspected the cerebral blood perfusion by arterial spin labeling technology and compared the differences between the two states.Results After hypoxic exposure,the pulse was (63.97± 10.43) beats/min (t=4.969,P＜0.01),it was lower than before which was (71.46±10.63) beats/min.The oxygen saturation was (92.46±3.64)％,it was lower than before which was (96.31±1.23)％ (t=6.437,P＜0.01).Arterial spin labeling (ASL) in pilots after hypoxic exposure showed lower cerebral blood flow (CBF) values prominently in the following regions:the bilateral superior temporal gyrus,the bilateral middle temporal gyrus,the left inferior temporal gyrus,the right middle occipital gyrus,the right inferior occipital gyrus,the bilateral lingual gyrus,the right fusiform gyrus,the right cuneus and cerebellum (P＜0.05).Conclusions The cerebral blood perfusion after hypoxic exposure is decreased mainly in the temporal and occipital lobe for the right side,and arterial spin-labeling technique can monitor CBF changes of the pilots in hypoxic exposure.

Objective To evaluate dual-source dual-energy CT(DSCT) for the differentiation of urinary stone composition in vitro. Methods Ninety-seven urinary stones were obtained by endoscopic lithotripsy and scanned using dual-source dual-energy CT. The stones were divided into six groups according to infrared spectroscopy stone analysis: uric acid ( UA ) stones ( n = 10 ), cystine stones ( n = 5 ), struvite stones( n = 6), calcium oxalate ( CaOx ) stones ( n = 22 ), mixed UA stones ( n=7 ) and mixed calcium stones(n=47). Hounsfield units (HU) of each stone were recorded for the 80 kV and the 140 kV datasets by hand-drawing method. HU difference, HU ratio and dual energy index ( DEI ) were calculated and compared among the stone groups with one-way ANOVA. Using dual energy software to determine the composition of all stones, results were compared to infrared spectroscopy analysis. Results There were statistical differences in HU difference [(-17±13), (229±34),(309 ±45), (512 ±97), (201±64)and (530±71) HU respectively], in HU ratio (0.96±0.03, 1.34 ±0.04, 1.41 ±0.03, 1.47 ±0.03,1.30±0.07, and 1.49 ±0.03 respectively), and DEI( -0.006 ±0.004, 0.064 ±0.007, 0.080 ±0. 007, 0. 108±0.011 ,0. 055 ±0.014 and 0. 112 ±0.008 respectively ) among different stone groups(F=124. 894,407.028, 322. 864 respectively, P ＜0. 01 ). There were statistical differences in HU difference,HU ratio and DE1 between UA stones and the other groups( P ＜ 0. 01 ). There were statistical differences in HU difference, HU ratio and DEI between CaOx or mixed calcium stones and the other four groups (P＜0. 01 ). There was statistical difference in HU ratio between cystine and struvite stones ( P ＜ 0. 01 ). There were statistical differences in HU difference, HU ratio and DEI between struvite and mixed UA stones (P＜0. 05 ). Dual energy software correctly characterized 10 UA stones, 4 cystine stones, 22 CaOx stones and 6 mixed UA stones. Two struvite stones were considered to contain cystine. One cystine stone, 1 mixed UA stone, 4 struvite stones and 47 mixed calcium stones were considered to contain oxalate. Conclusions DSCT has the ability to differentiate urinary stone composition in vitro. With dual energy software, the UA, cystine and mixed UA stones can be differentiated from other types of stones.

Objective To evaluate the effieaey of test bolus technique with multi-slice spiral CT (MSCT) for determining the optimal scan delay time in CT Hepatic artery (HA)-portal vein (PV) angiography and multi-phase scanning.Methods MSCT liver angiography and multi-phase scanning were performed in 187 patients divided randomly into two groups.In group A (n =59),the scan delay time was set according to the subjective experiences of operators; in group B (n=128),the scan delay time was determined by test bolus technique.Abdominal aorta and superior mesenteric,vein were selected as target blood vessels,and 50 HU was set as enhancement threshold value.20 ml contrast agent was injected intravenously and time-density curve of target blood vessels were obtained,then HA-PV scanning delay time were calculated respectively.The quality of CTA images obtained by using these 2 methods were compared and statistically analysed using Chi-square criterion.Resuits For hepatic artery phase,the images of group A are:excellent in 34(58%),good in 17(29%),and poor in 8 (13%),while those of group B are excellent in 128( 100%),good in 0(0%),and poor in 0(0%).For portal vein phase,the images of group Aare:excellent in 23(39%),good in 27(46%),and poor in 9(15%),while those of group B are excellent in 96 (75%),good in 28 (22%),and poor in 4 (3%) respectively.There was statistically significant difference between the ratios of image quality in group A and group B (X2=14.97,9.18,P < 0.05).Conclusion Accurate scan delay time was best determined by using test bolus technique,which can improve the image quality of liver angingraphy and multi-phase scanning.

OBJECTIVESTo assess the value of non-invasive medical imaging for diagnosis of carotid artery stenosis and to study the relationship between carotid stenosis and brain infarction.

METHODSThirty-one patients with a total of 62 carotid arteries were studied using Doppler ultrasound (DUS) and magnetic resonance angiography (MRA). Eleven of the 31 patients were studied using CT angiography (CTA). CT and MRI of the brain were also done in all patients. The imaging results in 5 patients were compared with those of digital subtraction angiography (DSA). Eight patients with severe stenosis received carotid endarterectomy. The comparisons between the imaging results and pathological data were conducted in 2 patients.

RESULTSOf the 62 carotid arteries, mild stenosis was seen in 11, moderate in 14, severe in 21, obstructed in 4 and normal in 12. In 25 patients with severe stenosis or occlusion of carotid arteries, there were a total of 35 focal or multifocal infarcts on the ipsilateral cerebral hemisphere, and 15 infarcts on the contrary side. Compared with the results of the operations, DUS correctly diagnosed 6 stenoses, while MRA identified 7 correctly and CTA 8. Agreement on location of stenosis as performed by endarterectomy, DUS, MRA and CTA occurred in all patients. Histologically, areas of calcification and fibrousness were related to high densities on CTA, strong echoes on DUS, and low signal intensities on MRA. Relatively large amounts of necrotic material and foam cells filled with lipolytic materials on the intimal surface of arteries were observed during pathologically, corresponding to low and iso-densities on CTA, low echoes on DUS, and inhomogeneous signal intensities on MRA.

CONCLUSIONSA strong link exists between carotid stenosis and brain infarction. The combined use of DUS, MRA and CTA can improve diagnostic accuracy for the assessment of carotid artery stenosis, as well as assist in ascertaining the nature of the plaque.

Adult ; Aged ; Carotid Stenosis ; diagnosis ; pathology ; Cerebral Infarction ; diagnosis ; pathology ; Female ; Humans ; Magnetic Resonance Angiography ; Male ; Middle Aged ; Tomography, X-Ray Computed ; Ultrasonography, Doppler

Objective To evaluate the clinical application of spiral CT pulmonary angiography(SCTPA) in the diagnosis of pulmonary embolism(PE) and its limitation.Methods 52 cases of PE were analyzed.SCTPA were performed in all cases with slice thickness 3 mm,pitch 1.5~2.0,scanning time 0.8 s,reconstruction thickness 1mm.The reconstructions of SCTPA included MIP,MPR and SSD.Results 2898 pulmonary arteries in 52 cases were observed.The direct manifestations of PE were showed in 927 pulmonary arteries(32.0%) by SCTPA,in which superior segmental and inferior segmental of pulmonary arteries were involved respectively.The indirect manifestations of PE were showed by plain scan in 113 cases.Conclusion SCTPA is a high effective and noninvasive method in the diagnosis of PE especially for the PE of superior segmental.

Objective To estimate the accuracy of MR angiography(MRA) and CT angiography(CTA) in the evaluation of the carotid artery stenosis. Methods Eleven patients were studied with MRA and CTA. The results were compared with DSA, CT virtual endoscopy (CTVE), and Doppler ultrasound (DUS). MRA was performed with 2D and 3D TOF sequences. CTA was postprocessed using MIP and SSD. CTVE was performed using navigator function . Three patients with severe stenosis received carotid endarterectomy. Results There was a total of 22 carotid arteries studied, with 8 mild, 3 moderate, 5 severe stenosis, 1 occlusion, and 5 normal. Agreement on stenosis between CTA and DSA was found in 11 of 12 carotid arteries. Agreement on stenosis between MRA and DSA was found in 9. Plaques were delineated in CTA, CTVE, and confirmed by pathology in 3 cases. Postoperative MRA and CTA proved the release of stenosis. Conclusion MRA and DUS can be used as a screening technique to evaluate carotid artery stenosis and as a convenient follow up modality for post endarterectomy. CTA has a high degree of accuracy for the assessment of carotid artery stenosis compared with DSA, and it could provide information on calcified plaque.

To explore diagnostic acuity of helical CT colonscopic examination, simulated polyps were reproduced in 10 pig colons and 6 human colons obtained from colon resection. Helical CT colonoscopic scanning with different parameters was performed. The images were evaluated with Nav, Axial+MPR, SSD+Raysum. The diagnostic sensitivity of each method for the detection of simulated colonic polyps were assessed. The results indicated that the image quality of CT colonoscopy was improved with the decrease in collimation and pitch. The optimal angle of the colon lumen to the gantry was 90?. CT colonoscopy was superior to other imaging methods. Therefore, the performance of CTVC has a close relationship with the scanning parameters. The optimal scanning parameters were 5mm collimation, 1 5 pitch, and filling the colon with air. The combination of CTVC with other imaging methods would contribute to improving the diagnostic accuracy for the detection of colonic polyps.