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Increase in perceived case suspiciousness due to local contrast optimisation in digital screening mammography.

Objectives: To determine the influence of local contrast optimisation on diagnostic accuracy and perceived suspiciousness of digital screening mammograms.Methods: Data were collected from a screening region in the Netherlands and consisted of 263 digital screening cases (153 recalled,110 normal). Ea...

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Publicado en:European Radiology Vol. 22; no. 4; pp. 908 - 915
Autores principales: Visser R, Veldkamp WJ, Beijerinck D, Bun PA, Deurenberg JJ, Imhof-Tas MW, Schuur KH, Snoeren MM, den Heeten GJ, Karssemeijer N, Broeders MJ, Visser, Roelant, Veldkamp, Wouter J H, Beijerinck, David, Bun, Petra A M, Deurenberg, Jan J M, Imhof-Tas, Mechli W, Schuur, Klaas H, Snoeren, Miranda M, den Heeten, Gerard J
Formato: research Journal Article
Publicado: Springer Nature Apr2012
Acceso en línea:Ver este registro en EBSCOhost
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      dt: Apr2012
      vid: 22
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      pid: 237
      pub: Springer Nature
      place: New York, New York
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        10.1007/s00330-011-2320-2
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        atl: Increase in perceived case suspiciousness due to local contrast optimisation in digital screening mammography.
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          Visser R
          Veldkamp WJ
          Beijerinck D
          Bun PA
          Deurenberg JJ
          Imhof-Tas MW
          Schuur KH
          Snoeren MM
          den Heeten GJ
          Karssemeijer N
          Broeders MJ
          Visser, Roelant
          Veldkamp, Wouter J H
          Beijerinck, David
          Bun, Petra A M
          Deurenberg, Jan J M
          Imhof-Tas, Mechli W
          Schuur, Klaas H
          Snoeren, Miranda M
          den Heeten, Gerard J
        affil: National Expert and Training Centre for Breast Cancer Screening, P.O. Box 6873, 6503 GJ, Nijmegen, the Netherlands
      sug:
        subj:
          Breast Neoplasms Epidemiology
          Breast Neoplasms Radiography
          Early Detection of Cancer Statistics and Numerical Data
          Mammography Statistics and Numerical Data
          Radiographic Image Enhancement Methods
          Aged
          Aged, 80 and Over
          Breast Neoplasms Prevention and Control
          Female
          Human
          Middle Age
          Netherlands
          Observer Bias
          Prevalence
          Risk Assessment
          Risk Factors
          Aged: 65+ years
          Aged, 80 & over
          Middle Aged: 45-64 years
          Female
      ab: Objectives: To determine the influence of local contrast optimisation on diagnostic accuracy and perceived suspiciousness of digital screening mammograms.Methods: Data were collected from a screening region in the Netherlands and consisted of 263 digital screening cases (153 recalled,110 normal). Each case was available twice, once processed with a tissue equalisation (TE) algorithm and once with local contrast optimisation (PV). All cases had digitised previous mammograms. For both algorithms, the probability of malignancy of each finding was scored independently by six screening radiologists. Perceived case suspiciousness was defined as the highest probability of malignancy of all findings of a radiologist within a case. Differences in diagnostic accuracy of the processing algorithms were analysed by comparing the areas under the receiver operating characteristic curves (A(z)). Differences in perceived case suspiciousness were analysed using sign tests.Results: There was no significant difference in A(z) (TE: 0.909, PV 0.917, P = 0.46). For all radiologists, perceived case suspiciousness using PV was higher than using TE more often than vice versa (ratio: 1.14-2.12). This was significant (P <0.0083) for four radiologists.Conclusions: Optimisation of local contrast by image processing may increase perceived case suspiciousness, while diagnostic accuracy may remain similar.Key Points: Variations among different image processing algorithms for digital screening mammography are large. Current algorithms still aim for optimal local contrast with a low dynamic range. Although optimisation of contrast may increase sensitivity, diagnostic accuracy is probably unchanged. Increased local contrast may render both normal and abnormal structures more conspicuous.
      pubtype: Academic Journal
      doctype:
        research
        Journal Article
      ougenre: Article
    language: English
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