Choroidal Melanomas Near the Optic Disk or Macula

1993 ◽  
Vol 206 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Martin Zehetmayer ◽  
Rupert Menapace
Keyword(s):  
Optic Disk ◽  
Choroidal Melanomas

scholarly journals Testing Segmentation Popular Loss and Variations in Three Multiclass Medical Imaging Problems

2021 ◽  
Vol 7 (2) ◽  
pp. 16
Author(s):  
Pedro Furtado
Keyword(s):  
False Negative ◽  
Magnetic Resonance Images ◽  
Medical Image Segmentation ◽  
Cross Entropy ◽  
Loss Functions ◽  
Optic Disk ◽  
False Negatives ◽  
Convolutional Network ◽  
Percentage Points ◽  
Class Background

Image structures are segmented automatically using deep learning (DL) for analysis and processing. The three most popular base loss functions are cross entropy (crossE), intersect-over-the-union (IoU), and dice. Which should be used, is it useful to consider simple variations, such as modifying formula coefficients? How do characteristics of different image structures influence scores? Taking three different medical image segmentation problems (segmentation of organs in magnetic resonance images (MRI), liver in computer tomography images (CT) and diabetic retinopathy lesions in eye fundus images (EFI)), we quantify loss functions and variations, as well as segmentation scores of different targets. We first describe the limitations of metrics, since loss is a metric, then we describe and test alternatives. Experimentally, we observed that DeeplabV3 outperforms UNet and fully convolutional network (FCN) in all datasets. Dice scored 1 to 6 percentage points (pp) higher than cross entropy over all datasets, IoU improved 0 to 3 pp. Varying formula coefficients improved scores, but the best choices depend on the dataset: compared to crossE, different false positive vs. false negative weights improved MRI by 12 pp, and assigning zero weight to background improved EFI by 6 pp. Multiclass segmentation scored higher than n-uniclass segmentation in MRI by 8 pp. EFI lesions score low compared to more constant structures (e.g., optic disk or even organs), but loss modifications improve those scores significantly 6 to 9 pp. Our conclusions are that dice is best, it is worth assigning 0 weight to class background and to test different weights on false positives and false negatives.

Management of choroidal melanomas with linear accelerator-based stereotactic radiosurgery

1999 ◽  
Vol 77 (1) ◽  
pp. 62-65 ◽  
Author(s):  
Stephen Wan Leung ◽  
Ching-Yeh Hsiung ◽  
Hui-Chun Chen ◽  
Han-Jung Chen ◽  
Sue-Ann Lin
Keyword(s):  
Stereotactic Radiosurgery ◽  
Linear Accelerator ◽  
Choroidal Melanomas

scholarly journals Tumour control probability after Ruthenium-106 brachytherapy for choroidal melanomas

2020 ◽  
Vol 59 (8) ◽  
pp. 918-925 ◽  
Author(s):  
Charlotte A. Espensen ◽  
Ane L. Appelt ◽  
Lotte S. Fog ◽  
Juliette Thariat ◽  
Anita B. Gothelf ◽  
...  
Keyword(s):  
Tumour Control ◽  
Tumour Control Probability ◽  
Ruthenium 106 Brachytherapy ◽  
Choroidal Melanomas

LONG-TERM OUTCOMES OF RADIAL OPTIC NEUROTOMY FOR MANAGEMENT OF OPTIC DISK PIT MACULOPATHY

Retina ◽  
2016 ◽  
Vol 36 (12) ◽  
pp. 2419-2427 ◽  
Author(s):  
Murat Karacorlu ◽  
Isil Sayman Muslubas ◽  
Mumin Hocaoglu ◽  
Hakan Ozdemir ◽  
Serra Arf ◽  
...  
Keyword(s):  
Optic Disk ◽  
Long Term Outcomes ◽  
Radial Optic Neurotomy

scholarly journals Optic Disk Pit and Iridociliary Cyst Precipitating Angle Closure Glaucoma

2014 ◽  
Vol 8 (1) ◽  
pp. 33-35 ◽  
Author(s):  
Parul Ichhpujani ◽  
Savleen Kaur ◽  
Sushmita Kaushik ◽  
Surinder Singh Pandav
Keyword(s):  
Angle Closure Glaucoma ◽  
Optic Disk ◽  
Angle Closure

Cupping of the optic disk after methanol poisoning

2015 ◽  
Vol 99 (9) ◽  
pp. 1220-1223 ◽  
Author(s):  
Alberto Galvez-Ruiz ◽  
Sahar M Elkhamary ◽  
Nasira Asghar ◽  
Thomas M Bosley
Keyword(s):  
Optic Disk ◽  
Methanol Poisoning

The effect of optic disk edema on spontaneous venous pulsations

2003 ◽  
Vol 135 (5) ◽  
pp. 706-708 ◽  
Author(s):  
Timothy J. McCulley ◽  
Byron L. Lam ◽  
Swaraj Bose ◽  
William J. Feuer
Keyword(s):  
Optic Disk ◽  
Optic Disk Edema

Relationship of optic disk topography and visual function in patients withlarge cup-to-disk ratios

2003 ◽  
Vol 136 (5) ◽  
pp. 888-894 ◽  
Author(s):  
Steven L Mansberger ◽  
Linda M Zangwill ◽  
Pamela A Sample ◽  
Dongseok Choi ◽  
Robert N Weinreb
Keyword(s):  
Visual Function ◽  
Optic Disk ◽  
Relationship Of

Treatment of Small Choroidal Melanomas With Photocoagulation

1988 ◽  
Vol 19 (10) ◽  
pp. 738-742
Author(s):  
Alex E Jalkh ◽  
Clement L Trempe ◽  
Fadi P Nasrallah ◽  
John J Weiter ◽  
J Wallace McMeel ◽  
...  
Keyword(s):  
Choroidal Melanomas
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