Three-phase imaging of bone

Bone three-phase imaging can observe bone blood flow and blood pool, and provide more objective indicators for clinical differential diagnosis. (1) Blood flow phase: local large blood vessels were visualized 8 to 12 s after injection of the imaging agent, and the soft tissue contour gradually showed that the bone tissue was less radioactive. The development time of the corresponding arteries and parts on both sides is basically the same. (2) Blood pool phase: Most of the bone imaging agent still stays in the blood, the soft tissue contour is clearer, the radioactivity distribution is more uniform, the radioactivity of the bone part is slightly sparse, and the two sides are basically symmetrical. (3) Delayed phase: Each bone shows the same static and whole body bone imaging. Basic Information Specialist Category: Cardiovascular Examination Category: Radionuclide Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Abnormal performance can be summarized as increased exposure to focal radionuclides, decreased focal radionuclide uptake, and increased diffuse radionuclide uptake. Tips: Untie the metal objects before you check them. Normal value Local blood vessels in the blood flow phase are developed, and the soft tissue contour gradually shows that the bone tissue is less radioactive. The development time of the corresponding arteries and parts on both sides is basically the same. The soft tissue contour of the blood pool is clearer, the radioactivity distribution is more uniform, the radioactivity of the bone part is slightly sparse, and the two sides are basically symmetrical. Clinical significance Abnormal performance can be summarized as increased exposure to focal radionuclides, decreased focal radionuclide uptake, and increased diffuse radionuclide uptake. The analysis and identification of abnormal imaging should be combined with the history, pathogenesis and predilection sites of different diseases for comprehensive judgment. People who need to be examined: arthritis, bone disease patients can be examined. Positive results may be diseases: chronic osteomyelitis, spinal osteomyelitis, arthritis precautions Pre-intestation contraindications: 500ml of water after 30 minutes of intravenous infusion of the tracer, check within 2 to 5 hours, before the examination to resolve the urination (some patients with difficulty in urinary catheterization), remove the metal objects. Requirements for inspection: When the patient resolves urination, try to avoid urine contamination of the clothes, so as not to affect the inspection. If it is found to be contaminated, it should be removed first. If you are unable to stay in bed because of pain, first give an analgesic drug. Inspection process After the SPECT probe is placed in the lesion area, the "ball" intravenous injection of Tc-MDP740~1110MBq (20~30mCi) is immediately collected for 1 minute every 1~3 seconds, and the arterial blood perfusion series image is obtained. The blood flow phase; followed by a static image collected during 1 to 10 minutes, called the blood pool phase; after 3 hours, static imaging is performed, which is called the delayed phase. Comprehensive analysis of three-phase images is of great help to the analysis and judgment of diseases. Using computer ROI technology, the time-radioactivity curve of the observed part and the corresponding part of the healthy side was generated, and the difference of blood perfusion between the two sides was also quantitatively compared. Not suitable for the crowd Inappropriate people: generally not, but those who use tincture recently, the patient needs to discharge the tincture and then check. Adverse reactions and risks Nothing.