X-ray image processing apparatus and X-ray image processing method

An X-ray image processing method comprising the steps of:

• acquiring an X-ray image;
• performing frequency resolution processing for resolving the X-ray image into a high-frequency component image and a low-frequency component image;
• producing a high-resolution high-frequency component image from the high-frequency component image by a trained learning model that has been trained to enhance a resolution of an image without generating an image higher in resolution than the low-frequency component image from the low-frequency component image, the high-resolution high-frequency component image being an image higher in resolution than the high-frequency component image;
• and
• synthesizing an image based on the low-frequency component image without being made high definition and an image based on the high-resolution high-frequency component image being made high definition to generate a high-resolution X-ray image.

An X-ray image processing apparatus comprising:

• an image acquisition unit configured to acquire an X-ray image of a blood vessel of a subject and a device introduced into the blood vessel;
• a frequency resolution processing unit configured to perform frequency resolution processing for resolving the X-ray image into a high-frequency component image and a low-frequency component image, wherein the high-frequency component image corresponds to an edge of the blood vessel and an edge of the device;
• a high-resolution image generation unit configured to generate a high-resolution high-frequency component image from the high-frequency component image by a trained learning model that has been trained to enhance a resolution of an image without performing processing for generating an image higher in resolution than the low-frequency component image from the low-frequency component image, the high-resolution high-frequency component image being an image higher in resolution than the high-frequency component image;
• and
• an image synthesis unit configured to synthesize an image based on the low-frequency component image without being made high definition and an image based on the high-resolution high-frequency component image being made high definition to generate a high-resolution X-ray image.