Intelligentized muti-functional limb treatment and rehabilitation based on micro-computer is introduced in this paper. It is mainly used for rehabilitation in the disablement of limb. The range speed and training time can be automatically controlled. Training parameter and result can be monitored on computer. The apparatus has the advantages of high reliability, easy operation and compact design. It is a new kind of intelligent limb rehabilitation.

Objective To prospectively assess the diagnostic accuracy of MR inflow inversion recovery (IFIR) fast imaging employing steady-state acquisition (FIESTA) for detection of renal artery stenosis (RAS),as compared with renal artery CT angiography (CTA) performed as the reference standard.Methods Thirty patients [18 males,12 females; mean age (65.0±12.1) years] with arterial hypertension and suspected RAS were examined by 3.0-T 3D MR IFIR-FIESTA and renal artery CTA within a week.The IFIR-FIESTA image quality,the IFIR-FIESTA and CTA in display of second-order and third-order branches of renal artery were assessed by two experienced readers.The sensitivity,specificity,accuracy,and negative predictive value (NPV) of IFIR-FIESTA were calculated on artery-by-artery and patient-by-patient bases by the two readers.The inter-observer agreement between the two readers in determining the presence and grade of renal artery stenosis was assessed.Results The scores of qualification of IFIR-FIESTA image quality by reader A and B were (2.16±1.02) and (2.00 ± 0.14),there was no significant difference between them (Z=-0.037,P=0.971).IFIR-FIESTA and CTA in display of second-order and third-order branches of renal artery had no significant difference (x2 =0.298,P=0.585).In the assessment of all 64 main renal arteries by reader A,IFIR FIESTA on artery-by-artery basis had sensitivity,specificity,accuracy,and NPV of 100％,96％,97％,and 100％,respectively; the above parameters assessed by reader B were 100％,90％,93％,and 100％,respectively.There was excellent inter-observer agreement (Kappa=0.803) with the presence or absence of hemodynamically significant RAS.In the assessment of all 30 patients by reader A,IFIR-FIESTA on patient-by-patient basis had sensitivity,specificity,accuracy,and NPV of 100％,95％,97％,and 100％; the above parameters assessed by reader B were 100％,85％,90％,and 100％,respectively; there was good inter observer agreement (Kappa=0.724) with the presence or absence of hemodynamically significant RAS.Conclusions Compared with CTA,MR IFIR-FIESTA can excellently assess RAS without contrast material and radiation exposure,therefore,it can be used for screening of RAS,especially should be widely applied to elderly patients with arterial hypertension.

Although the type of XHD150B-IO 800mA X-ray machine possesses a damage protection electric circuit for the main thyristors, with the first switch of photographic hand valve pressed, abnormal instant exposure still appears when double (in different phase) or more than three main thyristors are broken through, short-circuited or mis-energized, and consequently the high voltage element or X-ray machine will break down. Therefore the original electric circuit must be improved. Material: A few of leads. Method: We exchange the conjunction sequence of three NO (normal open) contacting points of radiograph high voltage preparing work relay--MAG SW- R with three reverse parallel connection of main thyristors. Conclusion: The normal procedure of radiographic exposure won't be disturbed after the improvement. When whichever one or more than two main thyristors is broken through, short-circuited or mis-energized, the spoilage can be detected instantly and the protection circuit works correspondingly, which guarantees the safety of X-ray machine.

Objective To explore the relationship between image quality and different exposure intensity of digital radiography(DR).Methods Using a contrast-detail phantom Cdrad 2.0,observers evaluated images on the monitots when exposure parameters were 90 kV and mAs ranged from 0.5 to 16.0 mAs.Then calculate image quality figure(IQF),and ANOVA was used to analyze the difference of IQF under different radiation dose in 8 subjects.Results (1)When exposure parameters were 90 kV and mAs altered from 0.5 to 8.0 mAs.the IQF observed on the monitor was reduced,and the minimal value was 38.54±2.82.When mAs changing from 8.0 to 16.0 mAs.IQF observed on the monitor was increased,and the maximum was 44.33±2.35.(2)Under the different exposure condition,the difference of IQF values were statistically significant(F=60.35,P＜0.01).Conclusions With the increased exposure intensity,the image quality on monitor increased.When mAs was 8.0 mAs,image quality was the optimum When mAs was more than 8.0 mAs,the image quality on monitor reduced.

Objective:To implement rapid acquisition gradient echo(RAGE)pulse sequence in clinical MRI scaner.Methods:Pascal language is engaged to edit source code.Number of slice excited,order of phase encoded,phase recycle of RF pulse,NEX,on/off of the gradients,and so on are all controlled by sequence parameters.SI×N_(phase)×N_(slice) data of 32 bctys were allocated to restore the k space.Source code of sequence was compiled with executable file and is loaded to RINMR software.Image of human brain are acquired.The experiment has been conducted on 0.36T permanent MRI system.Resuits:In the case of 256×256 matrix acquisition,time of single slice is 4 seconds.The resolution and SNR of the image are all adquately satisfy the clinical application.

In this paper are analyzed the disadvantages of CGO-3000 digital subtraction angiography table Operating Box. The authors put forward a communication control scheme between single-chip microcomputer(SCM) and programmable logic controller(PLC). The details of hardware and software of communication are given.
Angiography, Digital Subtraction ; instrumentation ; Equipment Design ; Humans ; Image Processing, Computer-Assisted ; instrumentation ; Microcomputers ; Radiographic Image Enhancement ; instrumentation ; Software