Choline KinaseCholine O-AcetyltransferaseCholine DeficiencyHemicholinium 3BetaineCytidine Diphosphate CholineCholine DehydrogenasePhosphatidylcholinesPhosphorylcholinePhosphatidylethanolamine N-MethyltransferaseGlycerylphosphorylcholineEthanolamineLipotropic AgentsDeanolAcetylcholineRadiation DosageSarcosineLethal Dose 50EthanolaminesTime FactorsPhospholipidsCreatinePhosphatidylethanolaminesMagnetic Resonance SpectroscopyAdministration, OralMethionineInositolDrug Administration ScheduleCholine-Phosphate CytidylyltransferaseLiverRadiometryKineticsCholinergic FibersAcetylcholinesteraseVesicular Acetylcholine Transport ProteinsNootropic AgentsBetaine-Aldehyde DehydrogenaseDiacylglycerol CholinephosphotransferaseRats, Sprague-DawleyBrainDose-Response Relationship, RadiationThiocholineDose FractionationDouble-Blind MethodAspartic AcidAmino AlcoholsSodiumCholinergic AgentsRadiotherapy DosageCarbon RadioisotopesDietMembrane Transport ProteinsInjections, IntravenousTreatment OutcomeTritiumBiological TransportLysophosphatidylcholinesRats, Inbred StrainsPregnancyPhysostigmineRats, WistarArea Under CurveSphingomyelinsBiological AvailabilityBetaine-Homocysteine S-MethyltransferaseRadiotherapy Planning, Computer-AssistedParasympathetic Nervous SystemPlasmalogensHalf-LifeInfusions, IntravenousPotassiumLithiumCells, CulturedCholinergic NeuronsPhospholipase DNucleotidyltransferasesChromatography, Thin LayerPhospholipasesDrug InteractionsProtonsDisease Models, AnimalRabbitsBiological Transport, ActiveSeptum of BrainReceptors, NicotinicNeuronsBody BurdenHomocysteineCarbon IsotopesNutritional RequirementsThermoluminescent DosimetryOrganic Cation Transport ProteinsBody WeightPhosphotransferasesDietary SupplementsNeoplasmsEthanolaminephosphotransferaseAntineoplastic AgentsKidneyFolic Acid