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a x-ray computer tomography of a breast

Computer-Tomografichesky inspection of patients spent on multispiral computer tomograph AQUILION 64 (Toshiba, Japan).

Before the beginning of research to the patient explained a short and the procedure purposes, warned about necessity of a breath holding during the certain moments of time.

Originally carried out the digital topogram of area of a breast in direct and lateral projections at packing of the patient in horizontal position (on a back) and a breath holding on depth of an inspiration. The arms of the patient incurvated in ulnar joints, stacked over a head.

Native scanning (without intravenous introduction of a contrast agent) carried out all patient. A scanning zone chose from level of apexes of lungs to back costally-diafragmalnyh sine.

Used the following report of native scanning and research with boljusnym introduction of contrast agent (Kt-angiografija) (table 9).

Parametres of a computer tomography at research of area of a breast

Scanning parametres Value of parametres
Scanning zone From apexes of lungs to adrenals
Time of rotation of a X-ray tube () 0,4
Collimation (mm) 64х0,5
Shift of a table (mm) 32
Thickness of a reconstructed section (mm) 1 and 5
Strain on a tube (kv) 120
Effective exposition (in conditional recalculation on one section) (mas) 150
Scanning direction Kaudokranialnoe and kraniokaudalnoe
Duration of scanning () 4-7
Quantity of phases of scanning 3 (native, a phase of a pulmonary artery, an aortal phase)
Inkrement reconstruction (mm) 1 and 5
Algorithm of reconstruction With use "mjagkotkannogo" and "osteal" filters of reconstruction
Breath of the patient Detained on a usual inspiration
Position of the patient G orizontalno (laying) on a back, arms are got for a head

To contrast intensifying applied not ionic contrast agents with concentration of iodine from 300 to 370 mg of I/ml. Thus a contrast agent entered with such rate to provide an iodine stream - 1,6-2,0 g I/minute

Expression of contrasting estimated on indicators of the maximum x-ray density on scale Haunsfilda of blood in a trunk of a pulmonary artery.

Contrast agent introduction carried out in an ulnar vein. For a possibility exception ekstravazalnogo introductions of a contrast agent to the patient for the period of research established a plastic intravenous catheter. Statement of a plastic catheter gave the chance to infusion of a contrast agent with high rate and, in case of an urgent situation, provided reliable access to vascular system.

At research carrying out used single-phase introduction of a contrast agent with rate of 4-6 ml/SEC, depending on concentration of a contrast agent. The contrast agent volume has made from 50 to 80 ml. The scanning beginning defined by means of the specialised report of scanning (Sure View) which allowed to fix augmentation of densitometric indicators of blood in a right ventricle or in a trunk of a pulmonary artery at introduction of a contrast agent by dynamic scanning at the set level in the conditions of the lowered exposition on a X-ray tube (20-30 mas). Scanning began on reaching densitometric indicators of blood 100 HU. This criterion has been picked up empirically, during carrying out of researches.

In postprocessor processing widely used the various

Three-dimensional transformations. Most often spent construction of multiplane reconstruction. Their use in standard planes allowed to present diffusion of pathological changes more precisely. Application of curvilinear constructions gave the chance to track the structures having a wrong bent course on all extent. The image in a projection of the maximum intensity (MIP) allowed to track a course of vascular structures, to estimate mutual relations of vessels with organs and osteal structures. Images of three-dimensional rendering (VRT) used for the purpose of evident demonstration of a course of vessels for torakalnyh surgeons, their mutual relations with a lung neoplasm.

2.5.

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A source: GRISHCHENKOV Alexander Sergeevich. COMPUTER And MAGNITNO-RESONANT TOMOGRAPHIES In DIAGNOSTICS of the CANCER of the LUNG COMPLICATED by SECONDARY INFLAMMATORY PROCESS the Dissertation on competition of a scientific degree of the candidate of medical sciences. St.-Petersburg. 2014

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