A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature supercond...A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature superconducting bandpass filter with both linear phase response and quasi-elliptic function response is designed.The filter has a 40 MHz passband with a center frequency of 2,000 MHz.Its dimension is18.67 mm 9 25.96 mm.At 77 K,minimum insertion loss is0.26 dB in passband.The group delay variation is\3 ns over70%of the filter bandwidth.展开更多
Background:Intracranial supratentorial neuroenteric cysts are very rare lesions in the central nervous system.We described a neuroenteric cyst of the left lateral ventricle in a 38-year old male,which had been confirm...Background:Intracranial supratentorial neuroenteric cysts are very rare lesions in the central nervous system.We described a neuroenteric cyst of the left lateral ventricle in a 38-year old male,which had been confirmed by using immunohistochemistry.To date,this was the first reported case in which the neuroenteric cyst was located in the lateral ventricle.Case presentation:The patient had paroxysmal headache for half a year which exacerbated in the recent two months.MRI showed a 3cm*3cm*2.Scm cyst in the left lateral ventricle.We reported the first case,where the NC in the lateral ventricle was partly resected,provided new evidence to develop the hypothesis on NC etiology.The cyst was left partly due to the strong adherence to the surrounding structures.The final diagnosis was confirmed on histopathological and immunohistochemical analysis of the cyst.Conclusion:Lacking in characterization of the specific imaging features,neuroenteric cyst may be misdiagnosed as other types of cysts preoperatively.At present,surgical excision is the only effective treatment for neuroenteric cysts.Early diagnosis and more treatment options may be available in the future with more cases of neuroenteric cyst being reported and its pathogenesis being understood further,we hope the first reporting of the lateral ventricle NC by now can provide new evidence to NC etiology.展开更多
文摘A novel double coupling planar structure(a single microstrip line coupled with two resonators coincidental)is presented for the first time.Based on this structure,a six-pole parallel-coupled high-temperature superconducting bandpass filter with both linear phase response and quasi-elliptic function response is designed.The filter has a 40 MHz passband with a center frequency of 2,000 MHz.Its dimension is18.67 mm 9 25.96 mm.At 77 K,minimum insertion loss is0.26 dB in passband.The group delay variation is\3 ns over70%of the filter bandwidth.
文摘Background:Intracranial supratentorial neuroenteric cysts are very rare lesions in the central nervous system.We described a neuroenteric cyst of the left lateral ventricle in a 38-year old male,which had been confirmed by using immunohistochemistry.To date,this was the first reported case in which the neuroenteric cyst was located in the lateral ventricle.Case presentation:The patient had paroxysmal headache for half a year which exacerbated in the recent two months.MRI showed a 3cm*3cm*2.Scm cyst in the left lateral ventricle.We reported the first case,where the NC in the lateral ventricle was partly resected,provided new evidence to develop the hypothesis on NC etiology.The cyst was left partly due to the strong adherence to the surrounding structures.The final diagnosis was confirmed on histopathological and immunohistochemical analysis of the cyst.Conclusion:Lacking in characterization of the specific imaging features,neuroenteric cyst may be misdiagnosed as other types of cysts preoperatively.At present,surgical excision is the only effective treatment for neuroenteric cysts.Early diagnosis and more treatment options may be available in the future with more cases of neuroenteric cyst being reported and its pathogenesis being understood further,we hope the first reporting of the lateral ventricle NC by now can provide new evidence to NC etiology.
