documentation error correction

**Describe the bug**
fortex/health/readers/xray_image_reader.py(https://github.com/asyml/ForteHealth/pull/81/files#diff-1768718f2d2c35efa3726cac628cf25780923862b95313b0ccd2d9f33126f14b)

there are few minor comment error with the documentation of the above file.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]

**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.

Start by reviewing fortex/health/readers/xray_image_reader.py, using the file diff linked in the issue to locate the reported comments. Correct the minor documentation errors and confirm that the file's comments and documentation are clear and accurate.

Written by the indexing model from the issue text.