Clinical studies had demonstrated that early diagnosis of lesion could significantly reduce the risk of cancer. Magneto-acoustic-electrical tomography (MAET) is expected to become a new detection method due to its advantages of high resolution and high contrast. Based on thinking of modular design, a low-cost, digital magneto-acoustic conductivity detection system was designed and implemented in this study. The theory of MAET using chirp continuous wave excitation was introduced. The results of homogeneous phantom experiment with 0.5% NaCl clearly showed that the conductivity curve of homogeneous phantom was highly consistent with the actual physical size, which indicated that the chirp excitation theory in our proposed system was correct and feasible. Besides, the resolution obtained by 1 000 μs sweep time was better than that obtained by 500 μs and 1 500 μs, which means that sweep time is an important factor affecting the detection resolution of the conductivity. The same result was obtained in the experiments carried out on homogeneous phantoms with different concentrations of NaCl, which demonstrated the repeatability of our proposed MAET system.
ObjectivesTo evaluate the methodological quality of clinical practice guidelines (CPGs) of Chinese rehabilitation medicine.MethodsCBM, VIP, CNKI, WanFang Data and Medlive databases were electronically searched to collect CPGs of Chinese rehabilitation medicine from January 1979 to May 2018. Four reviewers evaluated the methodological quality of the CPGs by AGREE Ⅱ.ResultsA total of 11 CPGs were included, which involved 5 CPGs on nervous system rehabilitation, 1 CPG on bone and joint system rehabilitation, 1 CPG each on pediatric rehabilitation, internal medicine system rehabilitation, burn rehabilitation, earthquake rehabilitation and rehabilitation diagnosis and treatment criteria respectively. The results of AGREE Ⅱ score showed that the average scores on six domains were 65.3%, 28.0%, 9.3%, 42.1%, 6.3% and 4.0%. There were not any level A (recommended) guidelines. Two guidelines were level B (recommended after being revised). The other nine guidelines were level C (not recommended).ConclusionsThere are a few rehabilitation CPGs in China and the quality of methodology is low. AGREE's methods and concepts have not been fully used for formulation. The rigor of development, clarity of presentation, applicability and editorial independence of guidelines should be emphasized, so as to produce high level CPGs and improve clinical practice quality in rehabilitation medicine.