RadVis

RadVis (Radiology Visualization) is a visualization tool for medical images.

Installation

pip install radvis

RadSlice Viewer

Loading an image and displaying it with a slider

import radvis as rv

# Creates a 'RadImage' object containing the image data
image = rv.load_image('path/to/image.nii.gz') # Can also load from DICOM or Numpy files

slicer = rv.RadSlicer(image, axis=0)

slicer.display()

Create a RadImage from a numpy array

import radvis as rv
import numpy as np

# Creating a numpy array
image_data = np.random.rand(100, 100, 100)

# Creating a 'RadImage' object from the numpy array
image = rv.from_numpy(image_data)

slicer = rv.RadSlicer(image, axis=0)

slicer.display()

Adding masks to the image

import radvis as rv
import numpy as np

image = rv.load_image('path/to/image.nii.gz')

slicer = rv.RadSlicer(image, axis=0)

# 0 values wont be displayed
red_mask = np.zeros_like(image.image_data) 
red_mask[5:100, 5:100, 5:100] = 1

blue_mask = np.zeros_like(image.image_data)
blue_mask[70:150, 70:150, 70:150] = 1

slicer.add_mask(red_mask, color="red")
slicer.add_mask(blue_mask, color="blue")

slicer.display()

Mask can be another RadImage object so you can load up your masks from a DICOM or NIFTI

import radvis as rv
import numpy as np

AXIS = 1
IMAGE_PATH = "path/to/image.nii.gz"
IMAGE_MASK_PATH = "path/to/mask.nii.gz"

image = rv.load_image(IMAGE_PATH)
mask = rv.load_image(IMAGE_MASK_PATH)

slicer = rv.RadSlicer(image, AXIS, width=3)
slicer.add_mask(mask, color="red", alpha=0.3)

slicer.display()
slicer.save_animation(f"images/axis_{AXIS}_brain_seg.gif", fps=30)
slicer.save_frame(f"images/axis_{AXIS}_brain_seg.png", index=180, dpi=300)

You can also display multiple slicers at once

import radvis as rv
import numpy as np

img1 = rv.from_numpy(np.random.rand(50, 10, 10))
img2 = rv.from_numpy(np.random.rand(10, 50, 10))
img3 = rv.from_numpy(np.random.rand(10, 10, 50))
img4 = rv.from_numpy(np.random.rand(50, 10, 10))
img5 = rv.from_numpy(np.random.rand(10, 50, 10))
img6 = rv.from_numpy(np.random.rand(10, 10, 50))

rs1 = rv.RadSlicer(img1, title="Image 1")
rs2 = rv.RadSlicer(img2, title="Image 2")
rs3 = rv.RadSlicer(img3, title="Image 3")
rs4 = rv.RadSlicer(img4, title="Image 4")
rs5 = rv.RadSlicer(img5, title="Image 5")
rs6 = rv.RadSlicer(img6, title="Image 6")

rsg = rv.RadSlicerGroup([rs1, rs2, rs3, rs4, rs5, rs6], rows=2, cols=3)

rsg.update_slider_heights(0.05)

rsg.display()

Processing Module

The processing module of RadVis offers a set of functions to perform preprocessing tasks

Clipping

The percentile_clipping function clips pixel intensities above and below percentile ranges

Noise Reduction

The noise_reduction function reduces the amount of noise in the image

Normalization

The normalization function normalizes the pixel intensities of the image to a specified range.

Padding

The add_padding function adds padding evenly to match a target shape

Example usage of processing functions:

import radvis as rv
import numpy as np

# Loading image
image = rv.load_image(filepath='path/to/image.nii.gz')

# Applying processing functions
clipped_image = rv.processing.percentile_clipping(image, lower_percentile=0.25, upper_percentile=0.75)
filtered_image = rv.processing.noise_reduction(clipped_image, filter_size=1)
normalized_image = rv.processing.normalization(filtered_image, min_val=0, max_val=255)
padded_image = rv.processing.add_padding(normalized_image, target_shape=(128, 128, 128))

# Displaying processed image
slicer = rv.RadSlicer(padded_image, axis=0)
slicer.display()