Background: Malignant dysphagia due to esophagogastric cancer is associated with poor overall prognosis. Placements of self-expandable metal stents or plastic tubes are established methods as palliative treatment opti...Background: Malignant dysphagia due to esophagogastric cancer is associated with poor overall prognosis. Placements of self-expandable metal stents or plastic tubes are established methods as palliative treatment options. As an alternative and/or complementary therapy, radiologic techniques (external beam radiation/brachy therapy) and locally endoscopic techniques (laser, APC-beamer, PDT) are often used. Study and Goals: Retrospective trial of 153 patients treated in our department between 1993 and 2001. Forty-five patients received a plastic tube ( Group A) and 108 patients were treated with metal stents (Group B). Both groups were compared for improvement of dysphagia score, survival, recurrent dysphagia and complications. Results: Stent placement was successful in 41 of 45 (93%) pa tients of Group A and 107 of 108 (99%) of Group B. The median dysphagia score i mproved significantly in Group A (from 3.03 to 1.55, P = 0.010) and Group B (fro m 2.77 to 1.44, P = 0.009). Recurrent dysphagia was noted in 12 of 45 (27%) pat ients of Group A and 27 of 108 (25%) patients of Group B. Median survival time after stent insertion was 78 days (Group A) and 113 days (Group B). Overall comp lications occurred in 15 of 45 (33%) patients of Group A and 28 of 108 (26%) p atients of Group B. However, significantly (P = 0.05) more major complications w ere seen in Group A than in Group B (22%vs. 9%). Conclusions: Our results indi cate a marginal clinical benefit for metal stents versus plastic tubes in malign ant dysphagia in the long run. However, metal stents seem to be safer and associ ated with a prolonged improvement of dysphagia score.展开更多
Objective: The aim of this retrospective study was to evaluate the mammographic imaging features (markers) on different types of breast cancer and improve early radiological diagnosis of breast cancer. Methods: Analyz...Objective: The aim of this retrospective study was to evaluate the mammographic imaging features (markers) on different types of breast cancer and improve early radiological diagnosis of breast cancer. Methods: Analyzed the mammographic images of 118 patients with breast cancer confirmed by surgery and pathology. Among 118 cases, 70 cases were infiltrating ductal carcinoma (59.3%), 17 cases were ductal carcinoma in situ (DCIS, 14.4%), 7 cases were mucinous carcinoma (5.9%), 5 cases were medullary carcinoma (4.2%), 1 case was tiny micro carcinoma (0.9%) and 18 cases were other types cancer (15.3%). Results: The mammographic appearance of 118 patients with different breast cancer included: tumor mass (n = 80, 68.8%), microcalcification (n = 57, 48.3%), which were subdivided into two groups (a) microcalcification only, 13 cases (13/118, 11%); (b) combined with other mammographic features: 31 cases with tumor mass (31/118, 26.3%); 7 cases with architecture distortion (7/118, 5.9%), 6 cases with focal asymmetric density (6/118, 5.1%). Six cases appeared as architecture distortion only, 41 cases with abnormal vessel signs (34.7%). Conclusion: The microcalcifications are the most frequently basal X-ray signs in DCIS. Architecture distortion and focal asymmetric density are special X-ray signs that were easily missed. The abnormal vessels are also important accompaniment signs of breast cancer. The use of coned compression technique is particularly important to improve the radiological diagnosis of breast cancer.展开更多
The photodissociation dynamics of acetaldehyde in the radical channel CH3＋HCO has been reinvestigated using time-sliced velocity map imaging technique in the photolysis wavelength range of 275-321 nm. The CH3 fragmen...The photodissociation dynamics of acetaldehyde in the radical channel CH3＋HCO has been reinvestigated using time-sliced velocity map imaging technique in the photolysis wavelength range of 275-321 nm. The CH3 fragments have been probed via （2＋1） resonance-enhanced multiphoton ionization. Images are measured for CH3 formed in the ground and excited states （v2=0 and 1） of the umbrella vibrational mode. For acetaldehyde dissociation on T1 state after intersystem crossing from S1 state, the products are formed with high translational energy release and low internal excitation. The rotational and vibrational energy of both fragments increases with increasing photodissociation energy. The triplet barrier height is estimated at 3.8814-0.006 eV above the ground state of acetaldehyde.展开更多
In order to meet the demands of high efficient and real-time computer assisted diagnosis as well as screening in medical area, to improve the efficacy of parallel medical image processing is of great importance. This ...In order to meet the demands of high efficient and real-time computer assisted diagnosis as well as screening in medical area, to improve the efficacy of parallel medical image processing is of great importance. This article proposes improved strategies for parallel medical image processing applications,which is categorized into two genera. For each genus individual strategy is devised, including the theoretic algorithm for minimizing the exertion time. Experiment using mammograms not only justifies the validity of the theoretic analysis, with reasonable difference between the theoretic and measured value, but also shows that when adopting the improved strategies, efficacy of medical image parallel processing is improved greatly.展开更多
文摘Background: Malignant dysphagia due to esophagogastric cancer is associated with poor overall prognosis. Placements of self-expandable metal stents or plastic tubes are established methods as palliative treatment options. As an alternative and/or complementary therapy, radiologic techniques (external beam radiation/brachy therapy) and locally endoscopic techniques (laser, APC-beamer, PDT) are often used. Study and Goals: Retrospective trial of 153 patients treated in our department between 1993 and 2001. Forty-five patients received a plastic tube ( Group A) and 108 patients were treated with metal stents (Group B). Both groups were compared for improvement of dysphagia score, survival, recurrent dysphagia and complications. Results: Stent placement was successful in 41 of 45 (93%) pa tients of Group A and 107 of 108 (99%) of Group B. The median dysphagia score i mproved significantly in Group A (from 3.03 to 1.55, P = 0.010) and Group B (fro m 2.77 to 1.44, P = 0.009). Recurrent dysphagia was noted in 12 of 45 (27%) pat ients of Group A and 27 of 108 (25%) patients of Group B. Median survival time after stent insertion was 78 days (Group A) and 113 days (Group B). Overall comp lications occurred in 15 of 45 (33%) patients of Group A and 28 of 108 (26%) p atients of Group B. However, significantly (P = 0.05) more major complications w ere seen in Group A than in Group B (22%vs. 9%). Conclusions: Our results indi cate a marginal clinical benefit for metal stents versus plastic tubes in malign ant dysphagia in the long run. However, metal stents seem to be safer and associ ated with a prolonged improvement of dysphagia score.
文摘Objective: The aim of this retrospective study was to evaluate the mammographic imaging features (markers) on different types of breast cancer and improve early radiological diagnosis of breast cancer. Methods: Analyzed the mammographic images of 118 patients with breast cancer confirmed by surgery and pathology. Among 118 cases, 70 cases were infiltrating ductal carcinoma (59.3%), 17 cases were ductal carcinoma in situ (DCIS, 14.4%), 7 cases were mucinous carcinoma (5.9%), 5 cases were medullary carcinoma (4.2%), 1 case was tiny micro carcinoma (0.9%) and 18 cases were other types cancer (15.3%). Results: The mammographic appearance of 118 patients with different breast cancer included: tumor mass (n = 80, 68.8%), microcalcification (n = 57, 48.3%), which were subdivided into two groups (a) microcalcification only, 13 cases (13/118, 11%); (b) combined with other mammographic features: 31 cases with tumor mass (31/118, 26.3%); 7 cases with architecture distortion (7/118, 5.9%), 6 cases with focal asymmetric density (6/118, 5.1%). Six cases appeared as architecture distortion only, 41 cases with abnormal vessel signs (34.7%). Conclusion: The microcalcifications are the most frequently basal X-ray signs in DCIS. Architecture distortion and focal asymmetric density are special X-ray signs that were easily missed. The abnormal vessels are also important accompaniment signs of breast cancer. The use of coned compression technique is particularly important to improve the radiological diagnosis of breast cancer.
基金ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.21203186 and No.21073187）, the National Key Basic Research Program of China （No.2010CB923302）, 100 Talents Program of Chinese Academy of Sciences, and Knowledge Innovation Program of Chinese Academy of Sciences.
文摘The photodissociation dynamics of acetaldehyde in the radical channel CH3＋HCO has been reinvestigated using time-sliced velocity map imaging technique in the photolysis wavelength range of 275-321 nm. The CH3 fragments have been probed via （2＋1） resonance-enhanced multiphoton ionization. Images are measured for CH3 formed in the ground and excited states （v2=0 and 1） of the umbrella vibrational mode. For acetaldehyde dissociation on T1 state after intersystem crossing from S1 state, the products are formed with high translational energy release and low internal excitation. The rotational and vibrational energy of both fragments increases with increasing photodissociation energy. The triplet barrier height is estimated at 3.8814-0.006 eV above the ground state of acetaldehyde.
基金SEC E-Institute:Shanghai High Institutions Grid Project, National Natural Science Foundation of ChinaGrant number: No.60503039,10778604 and 60773148+1 种基金China’s National Fundamenfal Research 973 ProgramGrant number:2004CB217903
文摘In order to meet the demands of high efficient and real-time computer assisted diagnosis as well as screening in medical area, to improve the efficacy of parallel medical image processing is of great importance. This article proposes improved strategies for parallel medical image processing applications,which is categorized into two genera. For each genus individual strategy is devised, including the theoretic algorithm for minimizing the exertion time. Experiment using mammograms not only justifies the validity of the theoretic analysis, with reasonable difference between the theoretic and measured value, but also shows that when adopting the improved strategies, efficacy of medical image parallel processing is improved greatly.
