ObjectiveTo explore the value and role of post-processing techniques such as 3D reconstruction in the online education mode in neurosurgery undergraduate clinical probation teaching.MethodsA retrospective analysis method was used to collect 120 clinical 5-year medical students who were trained in neurosurgery at West China Hospital of Sichuan University from January 2019 to May 2020, including 40 students receiving traditional imaging materials offline (control group 1), 40 students being taught on image post-processing technology offline (control group 2), and 40 students being taught on-line image post-processing technology during the novel coronavirus epidemic (observational group). The students’ scores of departmental rotation examination and feedback survey results on teaching satisfaction were collected, and multiple comparison was conducted between the observational group and the two control groups respectively.ResultIn the control group 1, the control group 2, and the observational group, the theoretical test scores were 36.80±3.22, 38.17±2.61, and 38.97±2.79, respectively; the case analysis scores were 37.05±2.01, 38.40±2.62, and 39.25±2.88, respectively; the total scores were 73.85±5.06, 76.57±4.29, and 78.10±4.53, respectively; the scores of interest in teaching were 84.47±3.71, 86.05±2.87, and 86.82±2.60, respectively; the scores of mastery of knowledge were 82.85±4.39, 84.90±2.72, and 85.78±2.36, respectively; and the scores of overall satisfaction with teaching were 84.17±3.45, 85.97±2.64, and 86.37±2.59, respectively. The differences among the three groups were all statistically significant (P<0.05). The observational group differed significantly from the control group 1 in all the above scores (P<0.05), while did not differed from the control group 2 in any of the above scores (P>0.05).ConclusionsIn neurosurgery internship activities, the online application of image post-processing techniques such as 3D reconstruction will help students establish 3D spatial concepts, better understand the brain anatomy, and improve students’ academic performance and acceptance.
目的:探討嗅溝腦膜瘤的影像學表現與病理組織學之間的相關關系及其鑒別診斷。方法:對11例經手術及病理證實為嗅溝腦膜瘤的患者進行回顧性分析。男5例,女6例,年齡29～59歲,平均48歲。行CT檢查3例,MRI檢查8例,均為增強掃描。分析CT、MRI影像特征,并與手術、病理結果對照。結果:瘤灶起源于顱前窩嗅溝,多數密度或信號均勻,邊界清楚,均勻增強;少數不均勻增強,大部分病例出現腦膜尾征,少數伴鈣化、壞死、囊變。鄰近顱骨受累時引起骨質增生或受侵。結論:起源于嗅溝的腦膜瘤均具有典型的影像學表現特征。嗅溝骨質及其腦膜影像改變的顯示,對瘤灶起源具有重要的定位、定性診斷價值。MRI優于CT,但CT對鈣化和骨質改變顯示優于MRI。
目的：分析口咽部B細胞來源非霍奇金淋巴瘤(NHL)的CT表現、特征，初步探討不同病理類型B細胞來源NHL的CT表現特點，為臨床診斷和治療提供更為準確的信息。方法：對18例經病理證實的口咽部B細胞來源非霍奇金淋巴瘤的CT表現進行回顧性分析。結果：18例中，彌漫大B細胞淋巴瘤13例，占72.2%(13/18)，濾泡性淋巴瘤3例，占16.7%(3/18)，套細胞淋巴瘤1例，占5.6%(1/18)，結外邊緣區淋巴瘤(MALT淋巴瘤)1例，占5.6%(1/18)。病變分布為：扁桃體NHL9例(彌漫大B細胞淋巴瘤8例、套細胞淋巴瘤1例)；舌根8例(彌漫大B細胞淋巴瘤5例、濾泡性淋巴瘤3例)；軟腭1例，為結外邊緣區淋巴瘤(MALT淋巴瘤)。18例病變均表現為腫塊型。同時有淋巴結受累者12例(66.7%)，其中雙側受累者3例。結論：口咽B細胞來源NHL多發生于扁桃體及舌根。病理類型以彌漫大B細胞淋巴瘤為主，主要表現為腫塊。 CT對于B細胞來源NHL的鑒別診斷和病變范圍的判斷具有重要作用。
Objective To explore the manifestations and features of multi-slice spiral CT （MSCT） in the diagnosisof papillary thyroid carcinoma （PTC）. Methods Preoperative MSCT data of 35 cases of PTC proved by operation and pathology in our hospital form May. to Jun. in 2013 were observed retrospectively， to analyze the manifestations and characteristics of MSCT for it. Results Of 35 patients with PTC， MSCT totally showed 48 lesions， 68.6% （24/35） of patients with single lesion， 31.4% （11/35） of patients with 2-3 lesions， and 62.9% （22/35） of patients with lymph node metastasis. Of the 48 lesions， 29.2% （14/48） of lesions located in the left lobe， 70.8% （34/48） of lesions located in the right lobe；the lesions’ maximum diameter were 0.4-5.8cm， with the average maximum diameter of 1.3cm. There were 39.6% （19/48） of lesions with uneven density， 25.0% （12/48） of lesions with irregular shape， 47.9% （23/48） of lesions with blurred edges， 18.8% （9/48） of lesions had papillary enhanced tumor nodules， 10.4% （5/48） of lesions had peritumoral incomplete enhanced ring sign， 22.9% （11/48） of lesions invaded surrounding tissue or organs. There were 35.4% （17/48） of lesions had calcification， in which 76.4% （13/17） of lesions were fine granular calcification， 11.8% （2/17） of lesions were mixed calcification， and 11.8% （2/17） of lesions were coarse calcification. Conclusion MSCT manifestations of PTC have certain characteristics， which can provide imaging basis for clinical treatment options.
Objective To evaluate the diagnosis value of temporal Done high-resolution computed tornography (HRCT) in cholesteatoma. Methods There were 30 causes that had received the mastoid surgery because of cholesteatoma. Each patient’s mastoid plain films (Schuller’s and Mayer’s ) and HRCT had been taken and compared with each other and surgical findings and evaluated with health economic evaluation methods. Results The sensitivity rate in diagnosing cholesteatoma with HRCF was much higher than that with mastoid film (Plt;0.005). The more important benefit with HRCT was that it can afford the detail information in ear such as the ossicular chain, facial nerve canal, tympanic sinus, etc. which were basis for otologist in surgery to remove the focus thoroughly and reconstruct the middle ear function at the same time. In the view of health economic evaluation, HRCT is also much better than mastoid X-ray film. Conclusion HRCT should replace masloid Schuller’s and Mayer’s film in diagnosis cholesteatoma and HRCT should use as ordinary examination in chronic otitis media.