公开(公告)号：MX9602886A

公开(公告)日：1997-06-28

申请号：MX9602886

申请日：1995-01-19

Applicant: PHOTOELECTRON CORP

Inventor： DINSMORE MARK T ,  HARTE KENNETH J ,  SLISKI ALAN P ,  SMITH DONALD O ,  OETTINGER PWTER E

IPC: A61B19/00 ,  A61N5/10 ,  H01B11/22 ,  H01J35/00 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14 ,  H01J35/30 ,  H01J35/32 ,  H05G1/00 ,  H05G1/06 ,  H05G1/10 ,  H05G1/32 ,  H05G1/34 ,  A61N05/10

Abstract: La presente invencion se refiere a una fuente de rayos X que comprende un alojamiento (12), un suministro de energía (12A), una sonda tubular alargada (14), un conjunto objetivo (26), y un conjunto de direccion del haz (29). El alojamiento encierra a una fuente de haz de electrones (22), y tiene elementos para generar un haz de electrones a lo largo de una trayectoria del haz. El suministro de energía (12A) se puede programar para controlar el voltaje, la corriente, y el tiempo de un haz de electrones. La sonda tubular alargada (14) se extiende a lo largo de un eje central desde el alojamiento (12) alrededor de la trayectoria del haz. El conjunto objetivo (26) se extiende a lo largo del eje central, y se adapta para acoplarse con el extremo de la sonda (14) distal desde el alojamiento (12). El conjunto objetivo (26) incluye un elemento objetivo (26A) colocado a lo largo de la trayectoria del haz, en donde el elemento objetivo (26A) se adapta para emitir rayos X en un rango espectral previamente determinado en respuesta a los electrones incidentes. El conjunto de direccion del haz (29) incluye un elemento de desviacion (30), una red de retroalimentacion (31), y un controlador de desviacion (144). El elemento de desviacion (30) desvía el haz desde un eje nominal hasta una region superficial seleccionada sobre el elemento objetivo (26) en respuesta a una señal de control de desviacion. La red de retroalimentacion (31) incluye los elementos detectores de desviacion para detectar la desviacion del haz, y los elementos para generar una señal de retroalimentacion representativa de lo mismo. La figura más representativa de la invencion es la numero 16.

公开(公告)号：AU7259896A

公开(公告)日：1997-04-30

申请号：AU7259896

申请日：1996-10-04

Applicant: PHOTOELECTRON CORP

Inventor： SLISKI ALAN P ,  DALTERIO MICHAEL ,  SMITH DONALD O

IPC: G01T7/00 ,  A61N5/10 ,  G01T1/169 ,  G01D18/00

Abstract: A phantom apparatus for measuring the radiation dose distribution produced by a brachytherapy device used to treat a localized area with radiation. The brachytherapy device includes an insertable probe capable of producing predefined radiation dose geometries about a predefined point. The phantom apparatus includes a tank containing a medium having a radiological equivalent characteristic of the localized area to be treated. The phantom apparatus also includes a radiation sensor for measuring the radiation dose and a positioning system for moving the probe with respect to the radiation sensor. The radiation sensor is also coupled to a positioning system to orient the sensor for optimal dose measurements. The phantom apparatus includes a control system that coordinates the movements of the probe and the radiation sensor to avoid a collision. The control system moves the probe along a predefined path around radiation sensor and records the dose at predefined points along the path. In order to reduce the settling time of the sensor, the path is selected to coincide with the isodose contours of the radiation dose distribution of the probe.

公开(公告)号：CA2234276A1

公开(公告)日：1997-04-17

申请号：CA2234276

申请日：1996-10-04

Applicant: PHOTOELECTRON CORP

Inventor： DALTERIO MICHAEL ,  SMITH DONALD O ,  SLISKI ALAN P

IPC: A61N5/10 ,  G01T1/00 ,  G01T1/161 ,  G01T1/29

公开(公告)号：AU3196595A

公开(公告)日：1996-03-04

申请号：AU3196595

申请日：1995-07-18

Applicant: PHOTOELECTRON CORP

Inventor： SLISKI ALAN P

IPC: G21K4/00 ,  A61B6/00 ,  G01T1/02 ,  G01T1/08 ,  G03B42/02 ,  H01L27/148 ,  H01L27/00 ,  G01J5/02

Abstract: A system is disclosed for producing images representing radiation dose distributions in order to verify the radiation dose applied to a target area. The system uses a phantom assembly constructed of material that is the radiological equivalent of live tissue. The phantom assembly has slits where radiation sensitive film can be inserted and can include a channel for an insertable radiation generating device. The treatment dose is then applied to the phantom and the radiation sensitive film records the dose. A CCD camera microdensitometer is then used to read the exposed radiation sensitive film. The CCD camera microdensitometer includes a computer system which processes the image to remove artifacts and generates isodose contours for the radiation treatment applied. In addition, several pieces of radiation sensitive film in different planes can be exposed and processed in order to produce images representing the radiation dose distribution in three dimensions.

公开(公告)号：CA2195652A1

公开(公告)日：1996-02-15

申请号：CA2195652

申请日：1995-07-18

Applicant: PHOTOELECTRON CORP

Inventor： SLISKI ALAN P

IPC: G21K4/00 ,  A61B6/00 ,  G01T1/02 ,  G01T1/08 ,  G03B42/02 ,  H01L27/148 ,  G01T1/16

Abstract: A system is disclosed for producing images representing radiation dose distributions in order to verify the radiation dose applied to a target area. The system uses a phantom assembly constructed of material that is the radiological equivalent of live tissue. The phantom assembly has slits where radiation sensitive film can be inserted and can include a channel for an insertable radiation generating device. The treatment dose is then applied to the phantom and the radiation sensitive film records the dose. A CCD camera microdensitometer is then used to read the exposed radiation sensitive film. The CCD camera microdensitometer includes a computer system which processes the image to remove artifacts and generates isodose contours for the radiation treatment applied. In addition, several pieces of radiation sensitive film in different planes can be exposed and processed in order to produce images representing the radiation dose distribution in three dimensions.

公开(公告)号：CA2194759A1

公开(公告)日：1996-01-25

申请号：CA2194759

申请日：1995-07-11

Applicant: PHOTOELECTRON CORP

Inventor： SMITH DONALD O ,  SLISKI ALAN P ,  HARTE KENNETH J

IPC: G21K5/02 ,  A61B1/00 ,  A61N5/10 ,  G01N23/083 ,  G21K5/00 ,  G21K5/04 ,  G21K5/10 ,  H01J35/08 ,  H01J35/30 ,  H01J35/32 ,  H05G1/06 ,  H05G1/10 ,  H05G1/32 ,  H05G1/34 ,  A61B6/02

Abstract: The present invention is directed to an x-ray source for irradiating a surface defining a body cavity in accordance with a predetermined dose distribution. The source comprises a housing, an elongated tubular probe, a target assembly, and an inflatable balloon. The housing encloses an electron beam source and includes elements for generating an electron beam along a beam path. The tubular probe extends along a central axis from the housing about the beam path. The target assembly extends along the central axis and is coupled to the end of the probe distal from the housing. The target assembly includes a target element is positioned in the beam path. The target element is adapted to emit x-rays in response to electrons incident thereon from the beam. The probe tip assembly and associated control electronics include elements for positioning the target element in the beam path, and is substantially x-ray transparent. The balloon is affixed to the distal end of the probe and is inflatable so that when that probe end is inserted into a body cavity, the balloon may be inflated to stretch the cavity to a known shape. Positioning the probe tip inside the inflated balloon allows delivery of a uniform, or other desired, dose of radiation to the surface defining a body cavity.

公开(公告)号：AU663266B2

公开(公告)日：1995-09-28

申请号：AU7915494

申请日：1994-12-01

Applicant: PHOTOELECTRON CORP

Inventor： NOMIKOX PETER M ,  DINSMORE MARK T ,  SLISKI ALAN P

IPC: A61N5/10 ,  H01J35/22 ,  H01J35/32 ,  H05G1/00 ,  H05G1/06 ,  H05G1/10 ,  H05G1/20 ,  H05G1/32 ,  H05G1/34 ,  H05G1/52

Abstract: A low-level, electron beam activated source of preselected or programmable duration and intensity x-rays. The source may be fully or partially implanted into, or surface-mounted onto a desired area to affect a preselected irradiated region. In medical applications, a method of treating malignant cells, such as tumors, in vivo, utilizing the apparatus described above.

公开(公告)号：CA2181799A1

公开(公告)日：1995-07-27

申请号：CA2181799

申请日：1995-01-19

Applicant: PHOTOELECTRON CORP

Inventor： DINSMORE MARK T ,  SMITH DONALD O ,  SLISKI ALAN P ,  HARTE KENNETH J ,  OETTINGER PETER E

IPC: A61B19/00 ,  A61N5/10 ,  H01B11/22 ,  H01J35/00 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14 ,  H01J35/30 ,  H01J35/32 ,  H05G1/00 ,  H05G1/06 ,  H05G1/10 ,  H05G1/32 ,  H05G1/34 ,  H05G2/00 ,  H01J9/02

Abstract: This invention is directed to an x-ray source comprising a housing (12), a power supply (12A), an elongated tubular probe (14), a target assembly (26), and a beam steering assembly (29). The housing encloses an electron beam source (22), and has elements for generating an electron beam along a beam path. The power supply (12A) is programmable to control the voltage, current and timing of an electron beam. The elongated tubular probe (14) extends along a central axis from the housing (12) about the beam path. The target assembly (26) extends along the central axis and is adapted for coupling to end of the probe (14) distal from the housing (12). The target assembly (26) includes target element (26A) positioned along the beam path, wherein the target element (26A) is adapted to emit x-rays in a predetermined spectral range in response to incident electrons. The beam steering assembly (29) includes a deflection element (30), a feedback network (31) and a deflection controller (144). The deflection element (30) deflects the beam from a nominal axis to a selected surface region on the target element (26) in response to a deflection control signal. The feedback network (31) includes deflection sensing elements for sensing the deflection of the beam and elements for generating a feedback signal representative thereof.