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Objective To study the impact of respiratory frequency and amplitude of patients with the thoracic or abdomen tumor on 4DCT' s reconstructed image.Methods 75 thoracic or abdomen tumor patients who performed a scanning with belly belt-type respiratory gating on 4DCT between November 2012 to March 2013 in our hospital were retrieved.Reviewed their respiratory frequency,amplitude and fault distance of 4DCT' s reconstructed image and analyzed the correlation fault distance of the reconstructed image.The correlation analysis was used by bivariate Spearman method.Results Among these reconstructed images,fault distance more than 6 mm could be seen in 11 cases,fault distance ranging from 3 mm to 6 mm could be found in 46 cases,and distance less than 3 mm could be detected in 18 case.Respiratory frequency correlated significantly with the amplitude (rs =0.369,P =0.000);the respiratory rate had a tight association with the fault distance of the reconstructed image (r,=0.273,P=0.018);and respiratory amplitude was associated obviously with the fault distance of the reconstructed image (r,=0.696,P=0.000).Conclusions Both 4DCT reconstructed image and respiratory amplitude are significantly correlated to the continuity of the respiratory frequency.The smaller the respiratory frequence and amplitude change are,the better continuity will be.
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Objective To evaluate the short and long-term effect and explore the potential influential factors of focused ultrasound in the treatment of nonneoplastic epithelial disorders of vulva (NNEDV). Methods Clinical data of 583 patients suffering from NNEDV which was treated with focused ultrasound admitted from Jan. 2004 to Jun. 2014 to the hospital the authors served were collected. The treatment effects, complication rate, and potential influential factors were retrospectively analyzed. Results The total effective rate of focused ultrasound in treating NNEDV was 97.43%, the recurrence rate was 28.65%, and the complication rate was 9.09%. The effective rate was significantly increased after a course of strengthened treatment (P<0.05). The incidence of complications of CZF300 (high-power and short term model) treatment was significantly higher than that with CZF- 1(low-power and long term model, P<0.001). Conclusions A good clinical effect is predictable with focused ultrasound in the treatment of NNEDV. More promising results could be attained with multiple strengthened treatment, and a lower complication rate can be obtained with a low-power and long term treatment strategy.
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<p><b>OBJECTIVE</b>To investigate the relationship between occlusal plane and sagittal position of the mandible by examining dental and skeletal morphologies of average angle patients for better understanding of etiologies and definitive clinical guidelines of mandibular malpositions.</p><p><b>METHODS</b>The lateral cephalograms of 114 female average angle patients with neutral maxillary positions were selected and divided into three groups according to sagittal mandibular positions (ANB angle). Twenty-five skeletal and dental measurements were compared. The correlations between skeletal and dental measurements were analyzed by rectilinear correlation.</p><p><b>RESULTS</b>Cant of posterior occlusal plane (OP-P) and height of the upper second molar were significantly related to sagittal position of the mandible (P < 0.05). Height of the upper second molar was relatively inadequate and OP-P was sloped when the mandible was positioned posteriorly; conversely, height of the upper second molar was excessive and OP-P tended to be flat when the mandible was positioned anteriorly. Tooth axial inclinations were affected by sagittal position of the mandible. Maxillary teeth proclined distally and mandibular ones mesially for patients with retrognathia. On the other hand, maxillary teeth proclined mesially while mandibular ones distally for patients with prognathia.</p><p><b>CONCLUSION</b>There was a definite relationship between cant of posterior occlusal plane and sagittal position of the mandible in average angle patients, consistent with the dental morphologies of different skeletal configurations. In treating malocclusions of sagittal discrepancy of mandible, the height of posterior teeth and cant of OP-P might be a primary concern.</p>