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Jian-qun Yu

Publications and source records attributed to Jian-qun Yu.

4 recordsLinked to original sources
PubMed2006

[Study on identification using frontal sinus computer radiographic films of Han population in Sichuan province].

OBJECTIVE: To study identical indexes of frontal sinus in different locative computer radiology. METHODS: Frontal sinus radiographs were analysed by combining indexes of kinds of distances and patterns, further using descriptive study to describe frontal sinus and to analyse data statistically. RESULTS: The 8-identical classification of frontal sinus was proposed, basing on the ratio of frontal sinus width and orbit width, the bilateral asymmetry, the superiority of side, the numbers of arches of upper borders (left and right), the partial septa (left and right) and the location of the central septa. There was no statistical significance of sinus between sexes (P>0.05). CONCLUSION: Frontal sinus is tremendous inter-individual variation so it can be used for identification, but it can not be used for sex determination.

Adult↗
PubMed2004

[Idiopathic pulmonary fibrosis: correlation between helical CT findings and pulmonary function test results].

OBJECTIVE: To determine the correlation between helical CT findings and pulmonary function test (PFT) results from patients with idiopathic pulmonary fibrosis(IPF). METHODS: Helical CT scan was performed in 32 cases with clinically and/or pathologically proved idiopathic pulmonary fibrosis. Pulmonary function test for each patient was performed within 5 days before or after CT scan. The correlation between CT findings and pulmonary function test results was assessed. RESULTS: Pulmonary function test revealed characteristic restrictive ventilatory defect with reduction of total lung capacity, residual volume, vital capacity, and diffusing capacity of the lung for carbon monoxide. The patients with different severities of pulmonary function impairment had different CT features. 4 of 5 cases with slight impairment of the pulmonary function had the ground-glass opacity, 11 cases with moderate impairment showed the thickened interlobular septa (11/11, 100%), thickened lobular interstitium (9/11, 82%), distorted lobular structures (11/11, 100%) and thickened bronchovascular bundles (10/11, 91%). 16 cases with marked impairment showed the honeycombing (16/16, 100%) and the traction bronchiectasis (9/16, 55%). CONCLUSION: CT can provide significant information for the assessment of the pathologic severity of idiopathic pulmonary fibrosis. There is good correlation between CT findings and pulmonary function test results. CT combined with pulmonary function test can predict the progression, long term survival and response to therapy.

Adult↗
PubMed2004

[Optimal scanning collimation for segmental bronchi: experimental study with low-dose helical CT].

OBJECTIVE: To evaluate the effects of low-dose helical CT with different scanning collimation on the visualization of segmental bronchi and to determine the optimal scanning collimation in CT screening for early central lung cancer. METHODS: Forty healthy volunteers were randomly assigned to undergo the low-dose helical CT at 120 kVp, 50 mA, 0.75 s and pitch 1. One group (n = 20) underwent the sequential subsection scan of chest with the collimation of 10 mm for the apical and basilar zone, and of 8 mm and 5 mm for the hilar zone. The other (n = 20) went through CT scan with 10 mm collimation of the whole lung. The visualizations of lobar, segmental bronchi were compared at different collimations. ANOVA and multiple comparison were performed. RESULTS: The visualization of segmental bronchi on low-dose scan at 10 mm collimation was 60%, being lower than that at 8 mm (88%) or 5 mm (91%) collimation (P < 0.01). The segmental bronchi of right upper lobe were easily identified at collimation of 10 mm (82%), 8 mm (96%) and 5 mm (98%), as well as those of left upper lobe at 10 mm (83%), 8 mm (95%) and 5 mm (97%), whereas those of lingular lobe were difficultly identified at 10 mm (30%), 8 mm (60%) and 5 mm (70%). CONCLUSION: The lobar and segmental bronchi were visualized reliably by CT with 50 mA and 8 mm collimation, and therefore the sequential subsection scan of chest divided into three zones can be adapted to CT screening for early lung cancer.

Adult↗