Technicare, formerly known as Ohio Nuclear, made CT, DR and MRI scanners and other medical imaging equipment. Its headquarters was in Solon, Ohio. Originally an independent company which became publicly traded, it was later purchased by Johnson & Johnson. At the time, Invacare was also owned by Technicare. A Harvard Business Case was written about the challenges that precipitated the transition. The company did not do well under Johnson & Johnson and in 1986, under economic pressure following unrelated losses from two Tylenol product tampering cases, J&J folded the company, selling the intellectual property and profitable service business to General Electric, a competitor.

Ohio Nuclear's (ON) first products were nuclear medicine (NM) scanners. They made a rectilinear gamma scanner and a gamma camera in the 70s. This was followed by a variety of NM products. The company had bought also an ultrasound product line (formerly UNIRAD).

The following information is copied from a Technicare advertising brochure, which primarily focuses on Nuclear Medicine products. This is a personal possession and it is not known if any more of these documents survive.

1963 - Developed first whole body rectilinear scanner. 1964 - Introduced first dual head rectilinear scanner 1967 - developed scan minification principle 1968 - first to offer 750 cm/min scanning speed. 1972 - Introduced 37 tube scintillation camera 1974 - introduced large field scintillation camera to US market. 1975 - Introduced 37 tube large field mobile camera. Introduced DeltaScan, a high resolution (256 x 256) matrix whole body computed tomography scanner.

Of some additional interest is the <October, 1975, Scientific American></October, 1975, Scientific American>. On page 4 of this issue, the following statement is made (quoted verbatim from the issue).

"The Cover. The picture on the cover is a section through the chest of a living human subject made by the technique of reconstruction from projections (see "Image Reconstruction from Projections," page 56). In that technique a series of X-ray exposures made from different angles around the body are combined by computer to present a cross-sectional picture on the screen of a cathode-ray tube. In the picture on the cover the chest is seen as though it were viewed from above the patient's head. The dark spaces to the left and right are the lungs. The large red area in the middle is the heart. The white areas are bone; below the center is the spinal column, and around the lungs are sections through the ribs. In general the tomato red areas are muscular tissue and the lavender areas are fatty tissue. The branched areas in the lungs are blood vessels and bronchi. The picture was made (by the Delta Scanner built by Ohio-Nuclear, Inc.) in the course of a study that was conducted by Ralph J. Alfidi, M.D. of the Cleveland Clinic Foundation."

In CT, Technicare developed and sold the DeltaScan line of products. A prototype whole body scanner was installed in 1974 at the Cleveland Clinic. The body scanner was installed there and was introduced first. This was followed with the head only dual slice Delta 25 which competed with the EMI Mark-I, the world's first CT scanner. This followed the body scanner, Delta 50 one of the first devices to scan the whole body. Both the Delta 25 and 50 scanned the patient in 1–2 minutes which was about twice as fast as EMI products. These first units were of the first (single detector) and second (multiple detector) generation translate and rotate systems.

One of the features of this family of scanners was the elimination of the "water bag" that EMI used through the use of a beam hardening correction to produce a uniform field. Later on this led to the creation of the so-called "shaped filters" which helped to reduce dose and reduce the dynamic range of the radiation on the detectors.