Hi Akmal,
The reason why only one frame appears when using "imshow3D" to visualize the 83-frame DICOM image is likely because "imshow3D" is designed for 3D volumetric data, but you're using it to visualize a stack of 2D slices.
To visualize all 83 slices, you can use a for loop to iterate over each slice and display it using "imshow". Alternatively, you can use a "movie" function to create an animation that plays through all the slices.
Here are some resources you can look into: