Clinical applications of digital angiography with the harmonization function in body interventional radiology

Abstract

Digital subtraction angiography (DSA) is frequently applied in interventional radiology (IR). When DSA is not useful due to misregistration, digital angiography (DA) as an alternative option is used. In DA, the harmonization function (HF) works in real time by harmonizing the distribution of gray steps or reducing the dynamic range; thus, it can compress image gradations, decrease image contrast, and suppress halation artifacts. DA with HF as a good alternative to DSA is clinically advantageous in body IR for generating DSA-like images and simultaneously reducing various motion artifacts and misregistrations caused by patient body motion, poor breath-holding, bowel and ureter peristalsis, and cardiac pulsation as well as halation artifacts often stemming from the lung field. Free-breath DA with HF can improve body IR workflow and decrease the procedure time by reducing the risk of catheter dislocation and using background structures as anatomical landmarks, demonstrating reduced radiation exposure relative to DSA. Thus, HF should be more widely and effectively utilized for appropriate purposes in body IR. This article illustrates the basic facts and principles of HF in DA, and demonstrates clinical advantages and limitations of this function in body IR.

Efficacy Analysis of DSA-Guided Bronchial Arterial Chemoembolization Interventional Therapy in Patients with Middle-Advanced Primary Bronchial Lung Cancer

“…At the same time, the local effect of high-concentration chemotherapeutic drugs can significantly increase the concentration of chemotherapeutic drugs in the tumor area, significantly prolong the contact time with tumor tissue, and significantly improve the chemotherapy effect of tumor lesions and lymph node metastasis lesions, which improved the clinical efficacy significantly [ 4 ]. Due to the large bronchial anatomical variation, through the digital subtraction angiography (DSA) to show the direct blood supply artery of bronchial lung cancer is the key for the successful implementation of BACE [ 5 ]. At present, there are few comparative studies on DSA-guided BACE interventional therapy and conventional chemotherapy for lung cancer patients.…”

Preliminary Study of the Treatment Strategy for Retaining Traumatic Foreign Bodies Involving the Carotid Artery

“…9 Digital subtraction angiography can be used to visualize the state of blood vessels in the head and neck, the flow direction and the proximity of foreign bodies to other structures. 10,11 Interventional vascular embolization is one of the most commonly used methods for the treatment of bleeding diseases. 12 Therefore, we chose to use vascular interventional radiology for the diagnosis and treatment of patients injured by foreign bodies.…”

“…Vascular interventional radiology is a discipline that integrates imaging diagnosis and clinical treatment, including diagnostic angiography, drug perfusion, vascular embolization, and other treatment techniques 9. Digital subtraction angiography can be used to visualize the state of blood vessels in the head and neck, the flow direction and the proximity of foreign bodies to other structures 10,11. Interventional vascular embolization is one of the most commonly used methods for the treatment of bleeding diseases 12.…”

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“…Digital subtraction angiography (DSA) is a fluoroscopic technique commonly used in interventional radiology (IR) for accurately delineating blood vessels by removing radiopaque structures like bones [7].…”