Users should be able to read just the metadata (and not waste time reading the PixelData if they are not interested in it).

The current Transfer Options page leaves a bit to be desired. I propose that these aspects are improved:

• There isn't a way to enable a transfer syntax regardless of the SOP class (or at least for those already admitting at least one transfer syntax). This means that allowing a transfer syntax requires looking up every applicable SOP class.
• The "Select All" and "Deselect All" will check and

A single trailing space of a valid time or date can interfere with the core crate's capability of transforming the DICOM value into a chrono date/time value.

let val = PrimitiveValue::from("170435.45 ");
assert_eq!(val.to_time()?, NaiveTime::from_hms_micro(17, 4, 35, 450_000));

At the moment, standard codes used require manual typing of the code tuple, such as here. This is error-prone and long. Instead, we should use the #defined constants, as done in dcmsr: https://github.com/commontk/DCMTK/blob/patched-DCMTK-3.6.3_20180205/dcmsr/include/dcmtk/dcmsr/codes/dcm.h#L51.

It would be also i