公开(公告)号：US20070225697A1

公开(公告)日：2007-09-27

申请号：US11388108

申请日：2006-03-23

申请人： Ketan Shroff ,  Sing Chin ,  Amit Agarwal ,  Patrick Morin

发明人： Ketan Shroff ,  Sing Chin ,  Amit Agarwal ,  Patrick Morin

IPC分类号： A61B18/18 ,  A61B18/04

CPC分类号： A61B18/1442 ,  A61B18/18 ,  A61B2017/00084 ,  A61B2017/2945 ,  A61B2018/00363 ,  A61B2018/00375 ,  A61B2018/00809 ,  A61B2018/1432

摘要： An adjustable surgical clamp including one or more ablation elements creates a circular lesion in a first operating mode and a linear lesion in a second operating mode. A “box” lesion surrounding all four pulmonary veins may be formed by using the clamp to create two complimentary C-shaped lesions about pairs of the veins. A thermochromic liquid crystal strip that changes color at a tissue-ablating threshold temperature may be mounted on the surgical clamp to monitor temperature of the ablated tissue. Two microwave antennae may be positioned on the jaws of the clamp relative to each other to produce a combined substantially uniform field of tissue-ablating energy between the jaws.

摘要翻译： 包括一个或多个消融元件的可调节手术夹具在第二操作模式中产生在第一操作模式中的圆形损伤和线性损伤。 围绕所有四个肺静脉的“盒”病变可以通过使用夹具形成关于静脉对的两个互补的C形损伤来形成。 在组织消融阈值温度下改变颜色的热致变色液晶条可以安装在外科夹具上以监测烧蚀组织的温度。 两个微波天线可以相对于彼此定位在夹钳的钳口上，以在钳口之间产生组合的基本均匀的组织消融能量场。

公开(公告)号：US20060217694A1

公开(公告)日：2006-09-28

申请号：US10949014

申请日：2004-09-24

申请人： Sing Chin ,  Dany Berube ,  Dinesh Mody ,  Nancy Norris

发明人： Sing Chin ,  Dany Berube ,  Dinesh Mody ,  Nancy Norris

IPC分类号： A61B18/18

CPC分类号： A61B18/1492 ,  A61B18/02 ,  A61B18/18 ,  A61B18/1815 ,  A61B2017/00243 ,  A61B2018/00375 ,  A61B2018/00839 ,  A61B2018/0212 ,  A61B2018/1407 ,  A61B2018/1497

摘要： A system and method for positioning a medical instrument at a desired biological target tissue site is provided. The system includes an elongated sheath having a deflectable distal end configured to deflect or otherwise position at least a portion of a medical instrument during a surgical procedure allowing for the placement of the deflected portion adjacent or proximate to a predetermined target tissue surface. The positioning system may be incorporated into the medical instrument. The medical instrument may be an ablation system.

摘要翻译： 提供了一种用于将医疗器械定位在期望的生物靶组织部位的系统和方法。 该系统包括细长护套，其具有可偏转的远端，所述远端构造成在手术过程期间偏转或以其他方式定位医疗器械的至少一部分，从而允许偏转部分邻近或接近预定的靶组织表面。 定位系统可以并入到医疗器械中。 医疗器械可以是消融系统。

公开(公告)号：US4584478A

公开(公告)日：1986-04-22

申请号：US470475

申请日：1983-02-28

申请人： Sebastian Genna ,  Sing-Chin Pang

发明人： Sebastian Genna ,  Sing-Chin Pang

IPC分类号： G01T1/164 ,  G01T1/29 ,  G21K1/02 ,  G01T1/20

CPC分类号： G21K1/025 ,  A61B6/037 ,  G01T1/1642 ,  G01T1/2921 ,  G01T1/2985

摘要： A radionuclide emission tomography camera for sensing gamma ray emissions from a source within the field of view, including: a fixed position-sensitive detector, responsive to the gamma ray emissions and surrounding the field of view, for detecting the contact position and the trajectory from which a gamma ray emission originates; a rotatable collimator disposed between the fixed position-sensitive detector and the field of view and including at least one array of collimator elements for restricting and collimating the gamma ray emissions; and means for rotating the collimator relative to the fixed position-sensitive detector for exposing different sections of the position-sensitive detector to the gamma ray emissions in order to view the source from different angles.

摘要翻译： 一种放射性核素发射断层摄影机，用于在视野内感测来自源的伽马射线发射，包括：响应于伽马射线辐射并围绕视场的固定位置敏感检测器，用于检测接触位置和轨迹 这是伽马射线发射的起源; 设置在所述固定位置敏感检测器和所述视场之间并且包括用于限制和准直所述伽马射线辐射的至少一个准直器元件阵列的可旋转准直器; 以及用于相对于固定位置敏感检测器旋转准直仪的装置，用于将位置敏感检测器的不同部分暴露于伽马射线发射，以便从不同的角度观察源。

公开(公告)号：US4095107A

公开(公告)日：1978-06-13

申请号：US677205

申请日：1976-04-15

申请人： Sebastian Genna ,  Sing-Chin Pang

发明人： Sebastian Genna ,  Sing-Chin Pang

IPC分类号： G01T1/29 ,  G01T1/20

CPC分类号： G01T1/2985 ,  A61B6/037

摘要： A transaxial radionuclide emission camera apparatus and method for image reconstruction using data collected by the apparatus are disclosed. A significant feature of the camera apparatus is a detector means which is arcuately shaped. For example, a suitable detector means can be formed from an optically continuous, arcuately shaped strip of scintillation material and an array of photodetectors optically coupled to said scintillation material. These photodetectors sense light emitted by the scintillation material in response to absorbed radiation. Collimating means which converge to the center of an arc defined by the detector means are another significant feature. The transaxial camera apparatus and the method disclosed are useful in reconstructing images of the distribution of a source of penetrating radiation contained within a body. A particular example is the three-dimensional reconstruction of the distribution of a radiopharmaceutical in a human brain which is helpful in diagnosing and locating lesions or tumors of the brain. The apparatus can also be used in two-dimensional imaging.

公开(公告)号：US07639059B1

公开(公告)日：2009-12-29

申请号：US11853827

申请日：2007-09-12

申请人： Hao Yu ,  Sing Chin ,  Bill Wong

发明人： Hao Yu ,  Sing Chin ,  Bill Wong

IPC分类号： H03L5/00

CPC分类号： H03K19/018585

摘要： A reference voltage buffer circuit (20) includes first and second transistors (M1, M2) and first and second resistors (R1, R2) connected in series between positive and negative power supply voltages and providing a positive reference voltage (Vrp) and a negative reference voltage (Vrn) at the first current handling terminals of the first and second transistors, respectively. A first control voltage (Vg1) for driving the first transistor is generated by a first feedback loop and using a positive boosted voltage. A second control voltage (Vg2) for driving the second transistor is generated by a second feedback loop and using a negative boosted voltage. The first and second feedback loops establish the first and second control voltages while the positive and negative boosted voltages ensure sufficient drives are provided to the first and second transistors. The reference voltage buffer is capable of fast settling while maintaining a wide reference voltage range.

摘要翻译： 参考电压缓冲电路（20）包括串联连接在正电源电压和负电源电压之间的第一和第二晶体管（M1，M2）和第一和第二电阻器（R1，R2），并提供正参考电压（Vrp）和负 分别在第一和第二晶体管的第一电流处理端子处的参考电压（Vrn）。 用于驱动第一晶体管的第一控制电压（Vg1）由第一反馈回路产生并使用正升压电压。 用于驱动第二晶体管的第二控制电压（Vg2）由第二反馈回路产生并使用负升压电压。 第一和第二反馈环路建立第一和第二控制电压，而正和负升压电压确保向第一和第二晶体管提供足够的驱动。 参考电压缓冲器能够快速稳定，同时保持较宽的参考电压范围。