Kabushiki Kaisha Toshiba

Kunio Aoki

Satoru Ohishi

Michitaka Honda

Hiroshi Asahina

Yoshinori Nakatani

Toyomitsu Kanebako

Takuya Sakaguchi

Masayuki Nishiki

Shinichi Yamada

In a storing unit of a medical image processing apparatus, first 3D image corresponding to a first period and second 3D image data corresponding to a second period are stored. The first 3D image data corresponds to a period before contrast agent injection operation and/or therapeutic operation. The second 3D image data corresponds to a period after the contrast agent injection operation and/or therapeutic operation. A 3D subtracting unit subtracts the first 3D image data from the second 3D image data. In 3D subtraction image data, a portion having undergone a change due to contrast agent injection operation and/or therapeutic operation is emphasized. A pseudo 3D image data generating unit generates pseudo 3D image data on the basis of 3D subtraction image data. A displaying unit displays the pseudo 3D image data.

Medical image processing apparatus for scanning based on a set three-dimensional region of interest

X-ray diagnosis apparatus

When X -ray irradiation is performed with many X doses and the fall of temporary sensibility or the rise of the temporary offset arises, it is the X-ray diagnostic equipment which computes the correction by sensitiveness multiplier based on the sensibility characteristic or offset characteristic of each pixel, and rectifies data. In this X-ray diagnostic equipment, the correction by sensitiveness multiplier for data correction is determined based on the signal value detected last time at least. In integrating this correction by sensitiveness value from each pixel to the output signal, the influence by the fall of temporary sensibility or the rise of the temporary offset is removed.

X-ray diagnostic apparatus

Medical image processing apparatus

According to information input through a keyboard, an X-ray irradiation condition selecting portion selects an X-ray irradiation condition, retrieves a correspondence table according to this X-ray irradiation condition so as to read out a gain control state suitable for an irradiation condition, and drives an analog SW setting portion. According to a signal from the analog SW setting portion, an integration capacity of an initial stage integration amplifier is changed over. Further, according to other mode, accumulated electric charge Q of a picture element Cp is read out on a signal line and converted to a voltage Vo by the integration amplifier. By appropriately determining a sampling time by a sample/hold circuit after electric charge is read out, an influence of a switching element resistance can be excluded from a voltage Vx. Therefore, the voltage Vx can be sample held stably. Further, because the integration circuit has a characteristic of damping a high frequency noise generated in the integration amplifier, the S/N ratio of the voltage Vx can be improved.

Radiation detector, radiation detecting method and X-ray diagnosing

The connections among a plurality of dynamic image generating means, a plurality of work stations, a plurality of temporary storage means and a plurality of video tape recorders are switched from one to another a matrix switcher, so that the number of the video tape recorders may be smaller than the total number of the dynamic image generating means and the work stations. The dynamic image generating means are connected via the temporary storage means to the video tape recorders, and the video tape recorders are connected via the temporary storage means to the work stations, so that wait time at the time of image recording or reproduction can be shortened.

Image storage apparatus

An X-ray diagnostic apparatus repeatedly radiates pulse-like X-rays, repeatedly images X-rays passing through an object to be examined at a predetermined frame period, and sequentially displays a plurality of images thus obtained repeatedly. In this invention, the exposure dose can be reduced since the number of X-ray irradiation times per unit time is set to be smaller than the number of frames to be imaged per unit time.

Growing community of inventors

Yaita, Japan

Kunio Aoki