Si la radiografía sale bien, podré volver a caminar sin muletas en pocos días.

In Spanish, after si for a real future condition, you normally use the present tense, not the future.

So Spanish says:

• Si la radiografía sale bien, podré...

Literally, this looks like If the X-ray comes out well, I will be able...

This is the normal pattern:

• Si + present, future
• Si estudias, aprobarás.
• Si hace buen tiempo, iremos.

Using si + future in this kind of sentence is not standard Spanish.

Here, salir bien means something like:

• to turn out well
• to come out fine
• to show good results

With medical tests, scans, exams, and similar things, salir bien is very common. It does not literally mean the X-ray is physically moving out somewhere. It means the result is good or normal.

Examples:

• La analítica salió bien. = The blood test came back fine.
• El examen salió bien. = The exam went well.

So Si la radiografía sale bien means the X-ray result is good / looks good.

Podré is the future tense of poder = to be able to / can.

• puedo = I can / I am able to
• podré = I will be able to

In this sentence, the speaker is talking about a future possibility after the X-ray result, so podré is the natural choice.

Full structure:

• podré volver a caminar = I will be able to walk again

Note that poder has an irregular future stem:

• podr-

So it is:

• podré
• podrás
• podrá
• podremos
• podréis
• podrán

Volver a + infinitive means to do something again.

So:

• volver a caminar = to walk again

Other examples:

• Volví a leer el mensaje. = I read the message again.
• ¿Vas a volver a intentarlo? = Are you going to try again?

In your sentence, podré volver a caminar means I will be able to walk again.

Because the verb pattern is:

• volver a + infinitive

The a is required by the verb construction. You cannot normally say volver caminar.

Compare:

• empezar a caminar = to start walking
• aprender a caminar = to learn to walk
• volver a caminar = to walk again

So the a is just part of the grammar after volver when it means again.

In Spanish, after sin, you often use a noun without an article when you mean something in a general sense.

So:

• sin muletas = without crutches

This sounds natural and general: the person will walk without needing crutches.

You can sometimes hear sin las muletas, but that would usually sound more specific, as if referring to particular crutches already identified in the conversation.

For a general statement, sin muletas is the most natural choice.

Because muletas means crutches, and people normally use them as a pair. Spanish usually refers to them in the plural, just like English often does.

• una muleta = a crutch
• muletas = crutches

So:

• caminar sin muletas = to walk without crutches

En pocos días means in a few days.

It refers to the amount of time until something happens.

Examples:

• Volveré en dos días. = I’ll come back in two days.
• Estará listo en una semana. = It will be ready in a week.

So here:

• podré volver a caminar sin muletas en pocos días means
• I’ll be able to walk again without crutches in a few days

They are very similar, and in many contexts they mean almost the same thing.

• en pocos días = in a few days
• dentro de pocos días = within a few days / in a few days

Dentro de can sound a little more explicitly future-oriented, but in this sentence en pocos días is perfectly natural and common.

Spanish often uses the definite article more than English does.

So where English might say:

• If the X-ray looks good...

Spanish naturally says:

• Si la radiografía sale bien...

The article la helps identify the specific X-ray being discussed. In many cases, Spanish sounds more complete and natural with the article.

Yes, but the meaning shifts slightly.

• La radiografía está bien = the X-ray is fine / okay
• La radiografía sale bien = the X-ray comes out fine / shows good results

With tests and results, salir bien is especially idiomatic because it focuses on how the result turns out. Estar bien is understandable, but salir bien sounds more natural in this medical-results context.

Because puedo means I can now, in the present.

But the sentence is about something that will happen later, depending on the X-ray result. So Spanish uses the future:

• podré = I will be able to

Compare:

• Ahora puedo caminar sin muletas. = Now I can walk without crutches.
• Si la radiografía sale bien, podré caminar sin muletas. = If the X-ray looks good, I’ll be able to walk without crutches.

Yes. Radiografía can refer to:

• the X-ray image itself
• the X-ray examination / result, depending on context

In everyday use, Spanish often uses radiografía in a broad way, just as English uses X-ray both for the image and the test.

So in this sentence, it most likely refers to the medical result or the X-ray image being checked.

Radiografía is pronounced roughly:

• ra-dyo-gra-FEE-a

The written accent mark on í shows where the stress goes:

• ra-dio-gra-FÍ-a

Without the accent mark, the stress would follow a different default pattern, so the accent is necessary.

Also, note that ía is pronounced in two syllables here:

• fí-a

not as one single syllable.

Yes. Spanish word order is flexible, as long as the meaning stays clear.

For example, you could also say:

• Podré volver a caminar sin muletas en pocos días si la radiografía sale bien.

This means the same thing. The original version puts the condition first, which is very natural because it emphasizes that everything depends on the X-ray result.

It is neutral and natural. It works well in everyday conversation and in a medical context.

Nothing in it is especially formal or especially casual. It is simply standard Spanish.

• radiografía
• podré
• muletas
• en pocos días

All of these sound normal and appropriate in standard Spain Spanish.