12-Lead ECG IOD Modules(PS 3.3-2007 Page 172 ~ 172、812 ~ 818)

SOP class UID
1.2.840.10008.5.1.4.1.1.9.1.1

Modality(0008,0060)
Shall be ECG.

Waveform Sequence(5400,0100)
Items shall be between 1 and 5, inclusive.
(最多5個Item)

Number of Waveform Channels(003A,0005)
In each Waveform Sequence Item shall be between 1 and 13, inclusive.

The total number of channels encoded across all Items shall not exceed 13.
(如果有5個Item，5個Item加起來的Channel不能超過13個)

Number of Waveform Samples(003A,0010)
In each Waveform Sequence Item Shall be less than or equal to 16384.
(1個Channel的Samples最多有16384個)

Sampling Frequency(003A,001A)
In each Waveform Sequence Item shall be between 200 and 1000, inclusive.
(Frequency in Hz，意即每秒幾個取樣值)

16384 / 1000 = 16.384 即一個Item的呈現最多不會超過 16.384 Sec.
16384 / 200 = 81.920 即一個Item的呈現最多不會超過 81.920 Sec.

this allows over 16 seconds per channel at the maximum sampling frequency;
if longer recordings are required, the General ECG IOD may be used.

Waveform Sample Interpretation(5400,1006)
In each Waveform Sequence Item shall be SS(signed short)

Waveform Bits Allocated(5400,1004)
Each Sample's Bits
(需配合54001006來看)

Channel Definition Sequence(003A,0200)
003A0005有幾個Channel，此Sequence就會有幾個Item.

Channel Sensitivity(003A,0210)
Nominal numeric value of unit quantity of sample.

Channel Sensitivity Correction Factor(003A,0212)
Multiplier to be applied to encoded sample values to match units
specified in Channel Sensitivity(003A,0210). Required if Channel
Sensitivity is present.