假阳性

肝癌螺旋CT双期增强扫描影像学特征及CT假阳性病灶的病理分析

Helical Double-phase CT Scan Imaging Features of Hepatocellular Carcinoma and Pathology of False-positive Lesions

假阳性的问题导致螺旋CT扫描应用的局限性，应理性的对待。

The problem of false-positive results in helical CT scanning is limited and can be rationally managed .

但对扫描结果的解读也有可能出错，而且在所有乳房X光检查结果中，有一小部分要么是假阳性（将健康病人误诊为患有癌症），要么是假阴性（在疾病的传播过程中，没有诊断出疾病）。

But interpreting the scans leaves room for error , and a small percentage of all mammograms either return a false positive - misdiagnosing a healthy patient as having cancer - or false negative - missing the disease as it spreads .

菌落PCR法鉴定的重组率偏高，存在假阳性现象。

A high frequency of false-positives appeared in colony PCR identification .

MRI诊断结果：真阳性数49个，真阴性数22个，假阳性数2个，假阴性数3个，准确性是93.4%，敏感性是94.2%，特异性是91.7%。

MRI diagnosis 49 true-positive , 22 true-negative , 2 false-positive and 3 false-negative .

目的：了解MRI诊断腰椎间盘突出症的假阳性的问题。

Objectives : To analyze MRI examine false positive result of lumbar disc protrusion .

套式PCR检测体系扩增效率的分析及对假阳性的控制

Analysis of amplification efficiency of PCR detection system and control of false positive contamination

结果：DNA测序可排除PCR产物的假阳性。

Results : Our study indicated that pseudopositive results of PCR products were identified by DNA sequencing .

需要进一步研究PET扫描这种假阳性结果发生机制。

Further studies for mechanism of such false positive results on PET scan are warranted .

为排除一些假阳性，每个逆转录PCR反应都重复一次。

All the RT - PCR were done twice to minimize false positive differentially expressed bands .

平板运动试验ST段压低恢复时期的假阳性表现

Analysis of False Positive on Treadmill Exercise Testing ST Segment Depression Recover Time

目的：克服一次性PCR假阳性及非特异性条带干扰。

Objective : To overcome the interruption of false positive and undesirable nonspecific banding with single PCR .

酶联免疫法检测HBsAg假阳性原因分析

Analysis of False Positive by Euzymelinked Immunosorbent Assay to Detect HBsAg

但对弱weak阳性的患者要注意追踪，排除假阳性。

And it was necessary to pay attention to trace the patients whose antibodies were weak positive for eliminating false positive .

患者的ELISA一步法检测乙型肝炎抗-HBc、抗-HBe存在假阳性

Study of false positive reaction in determination of serum anti-HBc and anti-HBe by one-step ELISA

MiniVITAL全自动血培养仪假阳性/假阴性结果分析

Evaluation of false positive and false negative results for mini VITAL automated blood culture system

用该方法对人类基因组DNA、人类巨细胞病毒（HCMV）和大肠埃希菌DNA以及其他型别的HPV进行检测，均未见假阳性结果产生。

There was no false-positive result when it was used to detect human genome DNA , HCMV , E.

同时也因为受到生物细胞或脱氧核糖核酸（DNA）污染及当前分子生物技术的局限，可能导致出现假阳性或假阴性的测试结果。

Moreover , contamination from biological cell or DNA and the inherent limitation of the latest molecular technology might give false positive and false negative test results .

另外，目前的检测试剂在低危人群中的筛查还会出现假阳性的结果，所以HCV抗体检测试剂仍然不够完善。

In addition , these assays are prone to false-positive results , especially noticeable in low-risk populations .

酶免法检测HBeAg假阳性原因探讨

Discussion on Causes of HBeAg False Positive Reaction Detected by Enzyme Immunoassay

应用反Northern杂交去除假阳性，对真阳性的表达序列标签（EST）进行克隆、测序及同源性比较。

Reverse Northern blotting was employed to eliminate the false positive ESTs . The true positive EST were cloned and sequenced .

虽然非伤寒患儿肥达反应可呈假阳性反应，但O、H抗体凝集效价极少达到1∶800。

Although non typhoidal febrile children manifested false positive Widal test , agglutinin level at titre of 1 ∶ 800 was only found in a few patients .

通过ReverseNorthern鉴定，去除假阳性，对阳性克隆进行测序、BLAST比较、PCR鉴定及功能分析。

Screening the false positive recombination by reverse northern . The positive clones were used to sequence , BLAST analysis , PCR identify and function analysis .

结论抗HAV-IgM阳性的确定应依据临床症状、病史、年龄及RF水平来综合判定以降低假阳性。

Conclusions Clinical symptom , disease history , age and the level of RF are useful for the judgment of anti-HAV IgM positive .

但是，PSA的低特异性常常出现大量的假阳性和假阴性结果，影响临床判断。

However , low specificity of serum PSA leads to many false-positive and false-negative results and clinical uncertainty .

结果表明，SSH分析共获得151个阳性克隆，反向Northern杂交表明，其中11个为假阳性。

The result showed that SSH discovered 151 positive colonies , of which 11 colonies were false positive confirmed by reverse Northern blot .

次之为CHr<28·0pg/L，诊断IDA的假阳性率、假阴性率分别为10·4%和0%。

Its false positive ratio and false negative ratio were 9.2 % and 0 respectively .

SARS-CoV抗体实验诊断中的假阳性原因分析

Analysis of false-positive associated with antibody tests for SARS-CoV

良性乳腺病40例，CA15－3值9.6±5.8U／ml，假阳性率0%。

In 40 patients with benign breast diseases the serum level was 9.6 ± 5.8 u / ml with a false positive rate of 0 % .

SEAj组的假阳性率为1.2%，MSA组则未出现假阳性。

There was 1.2 % false positive rate in normal serum with SEAj , but no positive false reaction was detected with MSA .