目的 探讨多参数磁共振成像对T₁高信号间隔与非T₁高信号间隔的原发性鼻腔鼻窦黑色素瘤（PSM）的鉴别价值。方法 回顾性分析经病理证实的 PSM 44例,术前均接受常规,DWI 和DCE-MRI检查。通过单因素和多因素Logistic分析评估T₁高信号间隔与非T₁高信号间隔PSM各MRI参数的差异。结果 44例PSMs 中,T₁高信号间隔PSMs 25例,非T₁高信号间隔PSMs 19例。两者在多参数MRI中,仅T₂低信号间隔,ADC值、达峰时间（Tp）及最大相对增强率（MRER）在单变量分析中差异存在统计学意义（均P<0.05）,在多因素Logistic分析中差异均无统计学意义（P均>0.05）。结论 多参数MRI对区分T₁高信号间隔与非T₁高信号间隔的PSM具有一定的指导价值,但并不能作为区分两者的独立预测指标。

Objective To evaluate the diagnostic value of multi-parameter MRI in differential diagnosis of primary sinonasal melanoma（PSM）with high- and non-high-T₁ signal septa．Methods Forty-four patients pathologically confirmed with PSMs underwent conventional,DWI and DCE-MRI examinations before operation．Univariate and multivariate Logistic analyses were used to evaluate the differences of MRI parameters between high- and non-high-T₁ signal septa in PSMs．Results Among 44 PSMs,25 cases had high T₁ signal septa and 19 cases had non-T₁ high signal septa．In multi-parameter MRI,only T₂ low signal septa,the value of ADC,peak time（TP）and maximum relative enhancement rate（MRER）were significantly different in univariate analysis（P<0.05）,but not in multivariate Logistic analysis（P>0.05）．Conclusions Multi-parameter MRI has some value in differentiating PSM with high-T₁ and non-high-T₁ signal septa,but it can not be used as an independent predictor to distinguish them．

目的 探讨支气管肺类癌的CT表现,为临床诊断提供更多信息。方法 回顾性地分析我院8例经病理证实的支气管肺类癌患者的CT资料及临床表现,并复习相关文献。结果 8例CT表现均为肺内单发病灶,其中周围型2例,中央型6例,病理证实非典型类癌2例,典型类癌6例;6例边界清楚,且密度多均匀;2例呈分叶状,1例边缘毛糙、伴短毛刺;5例病灶内部见钙化灶,1例病灶内见脂肪成分,1例见少量胸积液;5例肿块表现为“冰山征”,2例表现为支气管腔内结节,1例病灶边缘毗邻支气管分支;6例出现阻塞性肺不张或肺实变;增强扫描5例强化较明显,CT值升高≥30HU,其中2例不典型类癌强化不均匀,2例见可见强化血管影;3例呈轻-中度强化表现。结论 支气管肺类癌的CT表现具有一定特征性,对于临床诊断有一定价值,但其确诊多需要依靠病理检查。

Objective To investigate the CT findings of bronchial carcinoid and to provide more information for clinical diagnosis. Methods The CT findings and clinicaldata were retrospectively analyzed in 8 patientsconfirmed by biopsy. Results All the 8 cases manifested as single round mass on CT images, including 2 peripheral lesions and 6 central lesions. It was proved that 2 atypical tumors and 6 typical tumors. CT findings of these cases consisted of well-defined border and uniform density(6 cases),lobulated contour(2 cases) and rough margin with short burr(1 case). 5 cases contained calcification,1 case contained fat component and 1 case contained a small amount of pleural lesionscould present as an “iceberg sign”(5 cases), intra-bronchial nodule(2 cases) or near the edge of the bronchus(1 case).The obstructive atelectasis or pulmonary consolidation was found in 6 cases. On CT contrast scanning, these lesions presented relatively significant enhancement(5 cases),usually the CT value increased ≥30HU, in which 2 cases of atypical carcinoid were inhomogeneous enhancement, and 2 cases showed enhanced vascular and mild to moderte enhancement(3 cases). Conclusion The CT findings of bronchial carcinoid have certain characteristics, which are certain value for clinical diagnosis, but the final diagnosis mostly depends on pathology.