Abstract: In a method and apparatus for scatter-glare correction in x-ray diagnostic images from a patient, a densitometric calibration phantom that reduces x-ray beam hardening effects. The calibration phantom is constructed from x-ray absorbing specks narrower than the x-ray aperture but thicker in the x-ray direction than the half-value thickness for diagnostic energy photons, the specks being aligned with the fan beams of x-rays from the x-ray source.

Abstract: Method and apparatus for scatter-glare correction in x-ray diagnostic images from a patient. A reference object placed between the x-ray source and the subject is imaged in superposition with the subject without completely blocking any area of the subject image. The density distribution of the reference object is designed to have very small spatial correlation with the density distribution of the subject. The scatter-glare component is modeled by convoluting the primary component with a parameterized response function. During post-processing of the digital image, the unknown parameters of the response function are adjusted to minimize a cost function based on the expectation that the correlation between the reference object and the subject should be small and that the values of the parameters not deviate significantly from the estimated values for a typical patient.

Abstract: The invention relates to apparatus for measuring blood pressure by providing an inflatable cuff and pulse sensing means for fixing to a digit such as, for example, a finger or toe, and electrical control circuit means for converting a sense pulsed into a visual or audible indication, pneumatic means for transmitting the sensed pulse to the converting means and pressure means for measuring the pressure exerted in the cuff, the arrangement being such that with the cuff in a operative position on the body, progressive inflation/deflation of the cuff is effected until pulse sensing means just detect the presence of the pulse thus providing an indication of the systolic blood pressure.