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目的:探讨双源CT双能量减影法与单源CT减影法诊断颅内动脉瘤的临床意义。方法:收集34例颅内动脉瘤患者(43个动脉瘤)的CT血管成像检查结果和DSA、手术资料,以其中行双源CT双能量减影法的15例结果为双源组,行单源CT减影法的19例结果为单源组,比较两种方法诊断颅内动脉瘤的敏感度及放射线剂量。结果:双源组19个颅内动脉瘤中,诊断与DSA或手术所见符合17个,部位或瘤体大小不符3个,双源CT双能量减影法诊断颅内动脉瘤的敏感度为85%。单源组23个动脉瘤中,诊断与DSA或手术所见符合18个,部位或瘤体大小不符合5个,单源CT减影法诊断颅内动脉瘤的敏感度为78%。两种方法诊断颅内动脉瘤的敏感度比较差异无统计学意义(P>0.05)。两组均未发现漏诊。双源组15例患者的放射线剂量为(1 259±161)mGy cm,有效剂量(2.90±0.37)mSv;单源组19例患者的DLP检查平均放射线剂量为(2 605±425)mGy cm,有效剂量(5.99±0.98)mSv。双源组放射线剂量明显低于单源组(P<0.05)。结论:双源CT双能量减影法与单源CT减影法均能有效检出动脉瘤,但双源CT双能量减影法的放射线剂量相对较少,更具安全性,是诊断颅内动脉瘤诊断的较佳方法。
Objective: To explore the clinical significance of dual-source CT dual-energy subtraction and single-source CT subtraction in the diagnosis of intracranial aneurysms. Methods: 34 cases of intracranial aneurysms (43 aneurysms) CT angiography and DSA surgery data were collected. The double-source CT dual-energy subtraction method of 15 cases of double-source group, 19 cases of source CT subtraction method results for the single source group, compared two methods of diagnosis of intracranial aneurysm sensitivity and radiation dose. Results: In the 19 intracranial aneurysms of double-source group, the diagnostic results were consistent with those seen by DSA or surgery in 17 cases and the size of the tumor or tumor did not conform to that of 3. The sensitivity of dual-source CT dual-energy subtraction in diagnosing intracranial aneurysms was 85%. In 23 aneurysms of single source group, the diagnostic results were 18 with DSA or surgical findings, and the size or size of the tumor did not coincide with 5. The sensitivity of single source CT subtraction in diagnosing intracranial aneurysms was 78%. There was no significant difference between the two methods in diagnosing intracranial aneurysm (P> 0.05). Misdiagnosis was found in both groups. In the dual source group, the radiation dose of DLP was (1 259 ± 161) mGy cm and the effective dose (2.90 ± 0.37) mSv in 15 patients in the dual source group. The average radiation dose of DLP in 19 patients in the single source group was (2 605 ± 425) mGy cm, Effective dose (5.99 ± 0.98) mSv. The radiation dose in the dual source group was significantly lower than that in the single source group (P <0.05). CONCLUSION: Dual-source CT dual-energy subtraction and single-source CT subtraction are effective in detecting aneurysms. However, dual-source CT dual-energy subtraction is less invasive and more safe for the diagnosis of intracranial A better method of aneurysm diagnosis.