/// <summary>
		/// Creates the CtAcquisitionTypeSequence in the underlying collection. Type 1.
		/// </summary>
		public CtAcquisitionTypeSequenceItem CreateCtAcquisitionTypeSequence()
		{
			var dicomAttribute = DicomAttributeProvider[DicomTags.CtAcquisitionTypeSequence];
			if (dicomAttribute.IsNull || dicomAttribute.IsEmpty)
			{
				var dicomSequenceItem = new DicomSequenceItem();
				dicomAttribute.Values = new[] {dicomSequenceItem};
				var sequenceType = new CtAcquisitionTypeSequenceItem(dicomSequenceItem);
				return sequenceType;
			}
			return new CtAcquisitionTypeSequenceItem(((DicomSequenceItem[]) dicomAttribute.Values)[0]);
		}