Application of CT in needle biopsy and interventional therapy

CT intervention is a mature and effective percutaneous non-vascular interventional technique, including CT-guided percutaneous biopsy needle and interventional therapy, which can be used in all parts of the body, including brain, chest, abdomen and musculoskeletal system.

CT has high density resolution and spatial resolution, which can clearly display the size, shape, location of lesions and the adjacent relationship between lesions and surrounding tissues and organs. Accurate localization of the lesion, and can clearly understand the situation of the soft tissue inside and around the lesion, so as to avoid important tissue structure or necrotic area of the lesion, can accurately determine the needle point, Angle and depth, and can be adjusted at any time under scanning monitoring, accurately achieve the puncture target! Ultrasound guided puncture, by contrast, has limitations, in the lungs and bone biopsy, because lung high attenuation coefficient, gas - soft tissue, the acoustic impedance plane and bone gas-liquid interface, ultrasonic energy attenuation, choose CT is better, and the fat, lesions in the skin on the surface of the deep, CT guided biopsy is better for targeted area evaluation.

Enhanced CT scan can show the blood supply of the lesion and the direction of the lesion blood vessels, avoid damage to the blood vessels and the main structures around the lesion, improve accuracy and reduce complications.

With the development of medical image processing and spatial positioning technology, CT navigation system appears. By reconstructing the three-dimensional image from the thin layer image of CT scan and combining with respiratory gating, the system connects the patient's anatomical structure with the spatial position of surgical instruments in the THREE-DIMENSIONAL image, which is called "registration". Dynamic feedback of interventional puncture process can be realized, and real-time guidance of puncture or interventional surgery can be achieved. This visualization can reduce surgery time and radiation dose.

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