#衡阳头条 ##南华大学附属南华医院#
Recently, the Cancer Prevention and Treatment Center of Nanhua Hospital affiliated to the University of South China has made an important breakthrough in the field of precision radiotherapy, and has successfully applied 3D printing technology to the radiotherapy process of patients with superficial organ tumors such as breast cancer and skin cancer. The introduction of this innovative technology provides cancer patients with a truly individualized tissue compensator, which significantly improves the accuracy and efficacy of radiotherapy.
As breast cancer is one of the most common malignant tumors in women, postoperative adjuvant radiotherapy is a key measure to reduce the local recurrence rate. In radiotherapy, superficial organs such as breast cancer and skin cancer need to be treated with a tissue compensator (BOLUS) on the surface to increase the local radiation dose.
However, the traditional silicone tissue compensator often cannot closely fit the surface contour of the patient's chest wall due to its fixed shape and unchanging thickness during radiotherapy, thus affecting the radiotherapy effect.
This innovative technology simulates 3D positioning through CT to accurately obtain the curvature data of the patient's body surface and model accordingly. Subsequently, 3D printing technology was used to produce an individualized tissue compensator that fits perfectly to the patient's body surface.
This compensator can ensure the accuracy of radiation dose distribution during radiotherapy, avoid dose errors caused by the compensator does not fit the patient's body surface, and thus improve the radiotherapy effect.
As the first beneficiary of this technology, Ms. Wang (pseudonym) was subjected to a three-dimensional CT simulation by the team of the Cancer Prevention and Treatment Center of Nanhua Hospital affiliated to the University of South China and the team of the Digital Medicine Center after undergoing modified radical resection of breast cancer, and modeled the body surface curvature data of the image, and produced an individualized tissue compensation "tailor-made" for Ms. Wang through 3D printing, which successfully assisted in radiotherapy.
Compared with traditional methods, this new technology not only improves the accuracy of radiotherapy, but also greatly improves the treatment experience of patients.
(▲ The body surface and the image display are very close)
Extension of knowledge
Breast cancer is one of the most common malignant tumors in women, ranking first and fifth in terms of incidence and mortality respectively, and has become the main cause of mencliating women's health, and is one of the most common malignant tumors that seriously affect women's physical and mental health and even endanger their lives.
Multidisciplinary and integrated treatment strategies such as surgery, chemotherapy, radiotherapy, targeted therapy and endocrine therapy have greatly improved the prevention and treatment of breast cancer patients. Radiotherapy is an important means of comprehensive treatment of breast cancer, and through precise radiotherapy, it can reduce the recurrence rate and prolong the survival of patients undergoing breast-conserving surgery and high-risk mastectomy.
In breast cancer radiotherapy, a tissue compensator (Bolus) equivalent to the density of human tissue needs to be placed on the surface of the human body, so that the original skin position becomes an area of a certain depth under the skin to increase the dose in the superficial area.
However, it is difficult for traditional tissue compensators to fully fit with superficial organs such as breast and chest wall, and there are large gaps, resulting in great uncertainty in the actual irradiated dose of superficial tissues, and the dose distribution of the target area is inconsistent with the radiotherapy plan, which affects the efficacy of radiotherapy.
In recent years, 3D printing technology has been combined with radiotherapy technology to simulate three-dimensional positioning by CT, and the body surface curvature data of the image has been modeled, and a "tailor-made" individualized tissue compensation has been produced through 3D printing, which solves the shortcomings of traditional compensation materials.
Hunan Medical Chat Special Author: Niu Guoliang, Nanhua Hospital, University of South China
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(Editor YT)