DR. RICHARD ALLEN MORRISON, MD
Radiology in Shawnee Mission, KS

5947891, Sep 7, 1999

Apr 25, 1997

8/843092

Richard A. Morrison - Shawnee Mission KS

A61N 500

600 6

A therapeutic instrument for irradiative treatment of the genital tract is provided comprising a tubular applicator, a separable vaginal retainer and an interlocking structure between the two. The tandem is adapted to receive a linear tube containing multiple sources of radiant energy and terminates at its inner end in a curved intrauterine portion. Two halves of the separable retainer surround the tandem and cooperatively form a vaginal cylinder for occupying the vaginal vault and a handle. The interlocking structure includes outwardly extending projections and cavities in the handle so positioned that the structure is visible to the physician at all times.

3991310, Nov 9, 1976

Feb 9, 1972

5/224712

Richard A. Morrison - Shawnee Mission KS

G03B 4116

250312

The center of tissue within a patient to be subjected to radiation treatment is located in terms of coordinates with respect to a predetermined origin defined by three mutually orthogonal reference axes. Projections of at least one of the axes are superimposed upon two radiographs in different radiographic planes showing the tissue center and surrounding features in enlarged dimensions. In order to determine the reduced, true coordinates of the tissue center in cases where frontal and lateral radiographs are obtained, one method is disclosed in which analytic geometry is applied to reduce the values of the projected coordinates. Reduction factors for the two radiographs are also ascertained so that the actual length, width and breadth of the treatment volume may be calculated. Alternatively, a localizer may be employed which positions the radiographs, or slides made therefrom, in orthogonal planes and illuminates the radiographs or slides with point light sources arranged to duplicate the geometry of the X-ray unit utilized in obtaining the radiographs. A transparency having graduated axes thereon is interposed between the light sources and the radiographs or slides and positioned such that projections of the origin of the graduated axes are aligned with the tissue centers on both of the radiographs, permitting the true coordinates and the dimensions of the treatment volume to be directly read from the graduations on the projected axes.

4172979, Oct 30, 1979

Jun 15, 1978

5/915996

Richard A. Morrison - Shawnee Mission KS

G02B 500

250505

A device implemented method for conformation radiotherapy of tumors or the like involves sequentially interposing a plurality of separate, individual radiation beam shaping shields between a tumor and a source of radiation as the latter is rotated about the tumor in order to deliver a plurality of separate doses of radiation to various profiles of the tumor which provides uniform, homogenious radiation dosage to the tumor. The method permits use of full thickness, central radiation absorbers for completely protecting healthy organs or living tissue lying in the path of the radiation beam. A treatment reel releasably carrying a plurality of the radiation shields each having a central absorber integral therewith, in aligned relationship on the circumference thereof is removably mounted for rotation on a treatment head carrying the radiation source which is revolvable in a course around the patient. Mechanism is provided for producing incremental rotation of the reel on the head as the latter shifts between treatment locations in its revolving course, whereby the radiation shields are sequentially moved into a shielding position when the head is disposed at respectively corresponding treatment locations.

3937971, Feb 10, 1976

Oct 11, 1974

5/514109

Richard A. Morrison - Prairie Village KS
Cecil W. Johnston - Independence MO

G21C 1100, H01J 3516

250515

A focused shield for use in connection with a radiation therapy machine or the like is constructed using a method and apparatus that results in a shield having a bevel-walled aperture. The aperture is cut into a focused shield blank and has a predetermined configuration corresponding to a selected area of a patient to be exposed to a field of radiation with the angularity of the aperture sidewalls relative to the radiation rays being such that any rays of a radiation beam in alignment with the aperture enter the same and do not strike the sidewalls thereof but rather pass through the aperture in an unimpeded manner. The method and apparatus employed in making the focused shield incorporates the use of a focused shield blank having a convexly rounded bottom side and a blank holding fixture, adapted for use with a band saw or the like, having a bowl-shaped concavity for receiving the blank and positioning the same on a surface that has a radius of curvatuve corresponding to the curvature of the blank bottom wall during the cutting of the aperture into the blank.

4244357, Jan 13, 1981

Jan 5, 1979

6/001160

Richard A. Morrison - Shawnee Mission KS

A61N 510

128 12

Cancer of the uterine cervix is treated with a combination of external beam radiation to the pelvis and a linear source uterovaginal applicator which utilizes the maximum distance available between the source and vaginal mucosa, thus achieving an improved percentage depth dose as well as dose homogeneity around the entire circumference of the vaginal vault.