President Donald Trump recently visited the Walter Reed National Military Medical Center for a follow-up check after his annual physical health exam earlier in the year.

On Monday, Trump revealed to reporters that he underwent an MRI scan during that second hospital visit, the results of which were "perfect," according to the Daily Mail.

The president, 79, did not disclose why he had that particular scan performed and instead referred reporters' questions to his doctors, who have given him a clean bill of health and asserted that he is doing well for his age.

Trump received an MRI scan

President Trump, while traveling to Japan on board Air Force One on Monday, was asked by reporters about his health checkup at Walter Reed on October 10 and whether he had undergone any special tests beyond a normal physical exam.

"I did. I got an MRI. It was perfect," Trump replied, according to CNN. "I gave you the full results. We had an MRI, and the machine, you know, the whole thing, and it was perfect."

MRI scans, or magnetic resonance imaging, are used by doctors to help diagnose or pinpoint a wide range of potential health issues, some more serious than others. Trump's doctors and the White House released a report following the hospital visit earlier this month, but there was no specific mention of an MRI scan at that time.

"I think they gave you a very conclusive -- nobody has ever given you reports like I gave you," Trump said in response to critics who've claimed that he's been less than fully transparent about his health status.

"And if I didn’t think it was going to be good, either, I would let you know negatively, I wouldn’t run. I’d do something," he added. "But the doctor said some of the best reports for the age, some of the best reports they’ve ever seen."

Trump also took another cognitive test

The Hill reported that President Trump also revealed to reporters that he'd undergone another cognitive test during his recent Walter Reed visit, which he used to go after two of his most outspoken Democratic critics in Congress, Reps. Alexandria Ocasio-Cortez (D-NY) and Jasmine Crockett (D-TX), whom he has accused of having little to no intelligence.

"You give her an IQ test. Have her pass, like, the exams that I decided to take when I was at Walter Reed," Trump said of the New York congresswoman. "I took -- those are very hard -- they’re really aptitude tests, I guess, in a certain way."

"The first couple of questions are easy. A tiger, an elephant, a giraffe, you know," he added. "When you get up to about five or six, and then when you get up to 10 and 20 and 25, they couldn’t come close to answering any of those questions."

White House doc says no major health concerns

CNN noted that, aside from a mid-summer diagnosis of chronic venous insufficiency, President Trump has been given the all-clear on his health by the White House physician, Navy Dr. Sean Barbabella, who otherwise declared Trump to be in "excellent overall health."

CVI is a relatively mild and common condition for older individuals in which the veins in the legs become damaged over time and have more difficulty circulating blood back to the heart, which can cause blood pooling and swelling in the lower extremities.

Also garnering some scrutiny from the media has been persistent bruising observed on the back of the president's right hand, but Barbabella dismissed that as a combined result of Trump's use of aspirin as a blood thinner for cardiovascular purposes and the "frequent handshaking" that he engages in as part of his job.