摘要:
A method of performing radiation therapy on a patient, involving exposing a target, usually a tumor, to a therapeutic dose of high energy electromagnetic radiation, preferably X-ray radiation, in the form of at least two non-overlapping microbeams of radiation, each microbeam having a width of less than about 1 millimeter. Target tissue exposed to the microbeams receives a radiation dose during the exposure that exceeds the maximum dose that such tissue can survive. Non-target tissue between the microbeams receives a dose of radiation below the threshold amount of radiation that can be survived by the tissue, and thereby permits the non-target tissue to regenerate. The microbeams may be directed at the target from one direction, or from more than one direction in which case the microbeams overlap within the target tissue enhancing the lethal effect of the irradiation while sparing the surrounding healthy tissue.
摘要:
In-vivo bone density measuring system using a modified emission computed tomographic gamma camera arrangement for detecting radiation from two separate sources located outside of the body of the patient and oppositely disposed to the gamma camera during rotation of the gamma camera and sources means about the patient for obtaining tomographic data. The two separate sources emitting at least two energy levels. The system includes processing means for the detected radiation to provide a bone mineral density map.
摘要:
A radiation delivery system generally includes either a synchrotron source or a support frame and a plurality of microbeam delivery devices supported on the support frame, both to deliver a beam in a hemispherical arrangement. Each of the microbeam delivery devices or synchrotron irradiation ports is adapted to deliver at least one microbeam of radiation along a microbeam delivery axis, wherein the microbeam delivery axes of the plurality of microbeam delivery devices cross within a common target volume.
摘要:
A method of assisting recovery of an injury site of the central nervous system (CNS) or treating a disease includes providing a therapeutic dose of X-ray radiation to a target volume through an array of parallel microplanar beams. The dose to treat CNS injury temporarily removes regeneration inhibitors from the irradiated site. Substantially unirradiated cells surviving between beams migrate to the in-beam portion and assist recovery. The dose may be staggered in fractions over sessions using angle-variable intersecting microbeam arrays (AVIMA). Additional doses are administered by varying the orientation of the beams. The method is enhanced by injecting stem cells into the injury site. One array or the AVIMA method is applied to ablate selected cells in a target volume associated with disease for palliative or curative effect. Atrial fibrillation is treated by irradiating the atrial wall to destroy myocardial cells while continuously rotating the subject.
摘要:
A method of performing microbeam radiation therapy (MRT) includes delivering a dose only to selected tissue in a target volume (10) with continuous broad beam, first, by interleaving arrays of microplanar beams (30,36) only at the target (10). Administered contrast agents can supplement the effect by preferentially increasing the target dose relative to dose in normal tissue. A broad beam effect is alternatively created using non-interleaving microbeam array(s) with scattering agents administered to selected tissue that preferentially increase valley dose (69) within target to approximate broad beam. The methods of interleaving microbeams are also applied to treat diseases and conditions by ablating at least a portion of selected tissue, or by damaging blood-brain barrier for efficient drug and/or cell administration. A system for performing interlaced microbeam radiosurgery preferably includes two orthogonal radiation source arms (102) for producing and interleaving microbeam arrays (30,36) at the target volume (10). The methods treat tumors, pain, epilepsy, and neurological diseases.
摘要:
A system and method for communicating secure, privatized data stored on a first user device with a second user device requesting access thereto includes initiating a timed access gate for receiving verification of authenticating credentials from the second user device, after the first user credentials associated with the first user device are verified. If the second user device is verified within the predetermined period of time, an authentication handshake between the first user device and the second user device is completed. On completion of the handshake, a communication channel is opened for transmitting the first user's privatized data between the first user device and the second user device.
摘要:
A method for delivering therapeutic light ion radiation to a target volume of a subject, wherein the target volume is located at a predetermined depth from the skin, includes irradiating a surface of the skin with an array of light ion minibeams comprising parallel, spatially distinct minibeams at the surface in an amount and spatially arranged and sized to maintain a tissue-sparing effect from the skin to a proximal side of the target volume, and to merge into a solid beam at a proximal side of the target volume. A gap between the parallel, spatially distinct minibeams at the surface and a species of light ions forming the minibeams are selected such that the array merges into a solid beam at a predetermined beam energy, and across all energies for Bragg-peak spreading, at a proximal side of the target volume.
摘要:
A method for delivering therapeutic heavy ion radiation to a subject, wherein a therapeutic dose of heavy ions is delivered substantially only to a target volume within the subject by generating a broad field of radiation effect substantially only within the target volume, and wherein the broad field of radiation effect is not generated in non-targeted tissue. The method includes the step of irradiating the target volume with at least two arrays of heavy ion microbeams, wherein the at least two arrays each have at least two parallel, spatially distinct heavy ion microbeams. The two arrays of microbeams are interleaved substantially only within the target volume to form a substantially continuous broad beam of radiation substantially only within the target volume.
摘要:
A system and method for providing, managing, and accessing a multi-user secure portable database using secure memory cards is provided. The database has a secure portion for storing security keys and a non-secure portion for encrypted data files. Access to the encrypted data files is controlled by assigning access rights through an access control matrix to each encrypted data file according to a hierarchical structure of users. A user requesting access is identified in the hierarchy, associated with a key for allowing the requested access, and the requested access allowed to a file in accordance with the rights allocated through the access control matrix. A patient can selectively grant access to encrypted medical records on his card to a physician. Authentication of the owner/patient is preferably required. Other records required by emergency medical personnel are readable from the same card without requiring permission from the patient.
摘要:
A system and method for communicating secure, privatized data stored on a first user device with a second user device requesting access thereto includes initiating a timed access gate for receiving verification of authenticating credentials from the second user device, after the first user credentials associated with the first user device are verified. If the second user device is verified within the predetermined period of time, an authentication handshake between the first user device and the second user device is completed. On completion of the handshake, a communication channel is opened for transmitting the first user's privatized data between the first user device and the second user device.